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SLIDE 1

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

■❙❆ ✷✵✵✾✱ ❙é♦✉❧✱ ❙♦✉t❤ ❑♦r❡❛

❲❤❛t ❆❜♦✉t ❱✉❧♥❡r❛❜✐❧✐t② t♦ ❛ ❋❛✉❧t ❆tt❛❝❦ ♦❢ t❤❡ ▼✐❧❧❡r✬s ❆❧❣♦r✐t❤♠ ❞✉r✐♥❣ ❛♥ ■❞❡♥t✐t② ❇❛s❡❞ Pr♦t♦❝♦❧ ❄

◆❛❞✐❛ ❊▲ ▼❘❆❇❊❚ ▲■❘▼✱ ■✸▼✱ ❯♥✐✈❡rs✐té ▼♦♥t♣❡❧❧✐❡r ✷ ❚❤✉rs❞❛② ✷✺t❤ ❏✉♥❡ ✷✵✵✾

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SLIDE 2

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❖✉t❧✐♥❡ ♦❢ t❤❡ ♣r❡s❡♥t❛t✐♦♥

P❛✐r✐♥❣s Pr♦♣❡rt✐❡s ♦❢ ♣❛✐r✐♥❣s P❛✐r✐♥❣ ❜❛s❡❞ ❝r②♣t♦❣r❛♣❤② ■❞❡♥t✐t② ❇❛s❡❞ ❈r②♣t♦❣r❛♣❤② ❈♦♥str✉❝t✐♦♥ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ Pr♦♣❡rt✐❡s ❈♦♥str✉❝t✐♦♥ ❋❛✉❧t ❛tt❛❝❦ ❉❡✜♥✐t✐♦♥ ❆❣❛✐♥st t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❈♦♥❝❧✉s✐♦♥

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SLIDE 3

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❖✉t❧✐♥❡

P❛✐r✐♥❣s Pr♦♣❡rt✐❡s ♦❢ ♣❛✐r✐♥❣s P❛✐r✐♥❣ ❜❛s❡❞ ❝r②♣t♦❣r❛♣❤② ■❞❡♥t✐t② ❇❛s❡❞ ❈r②♣t♦❣r❛♣❤② ❈♦♥str✉❝t✐♦♥ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ Pr♦♣❡rt✐❡s ❈♦♥str✉❝t✐♦♥ ❋❛✉❧t ❛tt❛❝❦ ❉❡✜♥✐t✐♦♥ ❆❣❛✐♥st t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❈♦♥❝❧✉s✐♦♥

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SLIDE 4

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❲❤❛t ✐s ❛ ♣❛✐r✐♥❣ ❄

▲❡t G✶✱ G✷ ❛♥❞ G✸ ❜❡ t❤r❡❡ ❣r♦✉♣s ✇✐t❤ t❤❡ s❛♠❡ ♦r❞❡r r✳ ❆ ♣❛✐r✐♥❣ ✐s ❛ ♠❛♣ ✿ ❡ : G✶ × G✷ → G✸ ✇❤✐❝❤ ✈❡r✐✜❡s t❤❡ ❢♦❧❧♦✇✐♥❣ ♣r♦♣❡rt✐❡s ✿

  • ◆♦♥ ❞❡❣❡♥❡r❛t❡ ❀
  • ❇✐❧✐♥❡❛r✐t② ❀

❈♦♥s❡q✉❡♥❝❡s

❥ ❡ ❥ P ◗ ❡ P ◗ ❥ ❡ P ❥ ◗

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SLIDE 5

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❲❤❛t ✐s ❛ ♣❛✐r✐♥❣ ❄

▲❡t G✶✱ G✷ ❛♥❞ G✸ ❜❡ t❤r❡❡ ❣r♦✉♣s ✇✐t❤ t❤❡ s❛♠❡ ♦r❞❡r r✳ ❆ ♣❛✐r✐♥❣ ✐s ❛ ♠❛♣ ✿ ❡ : G✶ × G✷ → G✸ ✇❤✐❝❤ ✈❡r✐✜❡s t❤❡ ❢♦❧❧♦✇✐♥❣ ♣r♦♣❡rt✐❡s ✿

  • ◆♦♥ ❞❡❣❡♥❡r❛t❡ ❀
  • ❇✐❧✐♥❡❛r✐t② ❀

❈♦♥s❡q✉❡♥❝❡s

∀❥ ∈ N, ❡([❥]P, ◗) = ❡(P, ◗)❥ = ❡(P, [❥]◗)

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SLIDE 6

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊❧❧✐♣t✐❝ ❈✉r✈❡ ❈r②♣t♦❣r❛♣❤② ❛♥❞ ♣❛✐r✐♥❣s

P❛rt ✶ ✲ ❈r②♣t❛♥❛❧②s❡

❚❤❡ ▼❖❱✴❋r❡② ❘ü❝❦ ❛tt❛❝❦ ❛❣❛✐♥st t❤❡ ❉▲P ♦♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡s ✐♥ ✶✾✾✸✱ ✶✾✾✹ ✿ ✉s✐♥❣ ♣❛✐r✐♥❣s✱ t❤❡ ❉▲P ♦♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡s ❜❡❝♦♠❡s ❛ ❉▲P ♦♥ ✜♥✐t❡ ✜❡❧❞✳

  • ✐✈❡♥ P ❛♥❞ ◗

P ❊

q ✱

t❤❡ ❉▲P ♦♥ ❊

q ❝♦♥s✐sts ✐♥ ✜♥❞✐♥❣

✳ ▲❡t ❙ ❊

q ❜❡ ❛ ♣♦✐♥t s✉❝❤ t❤❛t ❡ P ❙

✶✱ ❧❡t ❡ P ❙ ❣ ❛♥❞ ❡ ◗ ❙ ❤ ❊

q ✱ t❤❡♥

t❤❡ ❉▲P ❜❡❝♦♠❡s ✜♥❞✐♥❣ s✉❝❤ t❤❛t ❤ ❣ ✐♥ ❛ ✜♥✐t❡ ✜❡❧❞✳

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SLIDE 7

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊❧❧✐♣t✐❝ ❈✉r✈❡ ❈r②♣t♦❣r❛♣❤② ❛♥❞ ♣❛✐r✐♥❣s

P❛rt ✶ ✲ ❈r②♣t❛♥❛❧②s❡

❚❤❡ ▼❖❱✴❋r❡② ❘ü❝❦ ❛tt❛❝❦ ❛❣❛✐♥st t❤❡ ❉▲P ♦♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡s ✐♥ ✶✾✾✸✱ ✶✾✾✹ ✿ ✉s✐♥❣ ♣❛✐r✐♥❣s✱ t❤❡ ❉▲P ♦♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡s ❜❡❝♦♠❡s ❛ ❉▲P ♦♥ ✜♥✐t❡ ✜❡❧❞✳

  • ●✐✈❡♥ P ❛♥❞ ◗ = αP ∈ ❊(Fq)✱

t❤❡ ❉▲P ♦♥ ❊(Fq) ❝♦♥s✐sts ✐♥ ✜♥❞✐♥❣ α✳ ▲❡t ❙ ❊

q ❜❡ ❛ ♣♦✐♥t s✉❝❤ t❤❛t ❡ P ❙

✶✱ ❧❡t ❡ P ❙ ❣ ❛♥❞ ❡ ◗ ❙ ❤ ❊

q ✱ t❤❡♥

t❤❡ ❉▲P ❜❡❝♦♠❡s ✜♥❞✐♥❣ s✉❝❤ t❤❛t ❤ ❣ ✐♥ ❛ ✜♥✐t❡ ✜❡❧❞✳

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SLIDE 8

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊❧❧✐♣t✐❝ ❈✉r✈❡ ❈r②♣t♦❣r❛♣❤② ❛♥❞ ♣❛✐r✐♥❣s

P❛rt ✶ ✲ ❈r②♣t❛♥❛❧②s❡

❚❤❡ ▼❖❱✴❋r❡② ❘ü❝❦ ❛tt❛❝❦ ❛❣❛✐♥st t❤❡ ❉▲P ♦♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡s ✐♥ ✶✾✾✸✱ ✶✾✾✹ ✿ ✉s✐♥❣ ♣❛✐r✐♥❣s✱ t❤❡ ❉▲P ♦♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡s ❜❡❝♦♠❡s ❛ ❉▲P ♦♥ ✜♥✐t❡ ✜❡❧❞✳

  • ●✐✈❡♥ P ❛♥❞ ◗ = αP ∈ ❊(Fq)✱

t❤❡ ❉▲P ♦♥ ❊(Fq) ❝♦♥s✐sts ✐♥ ✜♥❞✐♥❣ α✳

  • ▲❡t ❙ ∈ ❊(Fq) ❜❡ ❛ ♣♦✐♥t s✉❝❤ t❤❛t ❡(P, ❙) = ✶✱

❧❡t ❡(P, ❙) = ❣ ❛♥❞ ❡(◗, ❙) = ❤ ∈ ❊(Fq)✱ t❤❡♥

  • t❤❡ ❉▲P ❜❡❝♦♠❡s ✜♥❞✐♥❣ α s✉❝❤ t❤❛t ❤ = ❣α ✐♥ ❛ ✜♥✐t❡ ✜❡❧❞✳
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SLIDE 9

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊❧❧✐♣t✐❝ ❈✉r✈❡ ❈r②♣t♦❣r❛♣❤② ❛♥❞ ♣❛✐r✐♥❣s

P❛rt ✷ ✲ ❈r②♣t♦❣r❛♣❤②

P❛✐r✐♥❣s ❛❧❧♦✇ t❤❡ ❝♦♥str✉❝t✐♦♥ ♦❢ ♥♦✈❡❧ ♣r♦t♦❝♦❧s ❛♥❞ s✐♠♣❧✐✜❝❛t✐♦♥ ♦❢ ❡①✐st✐♥❣ ♣r♦t♦❝♦❧s✳

  • ❚❤❡ tr✐ ♣❛rt✐t❡ ❉✐✣❡ ❍❡❧❧♠❛♥ ❦❡② ❡①❝❤❛♥❣❡ ♣r♦t♦❝♦❧ ✭❏♦✉①

✷✵✵✶✮

  • ❚❤❡ ■❞❡♥t✐t② ❇❛s❡❞ ❊♥❝r②♣t✐♦♥ ✭❇♦♥❡❤ ❛♥❞ ❋r❛♥❦❧✐♥ ✷✵✵✶✮
  • ❙❤♦rt s✐❣♥❛t✉r❡ s❝❤❡♠❡ ✭❇♦♥❡❤✱ ▲②♥♥✱ ❙❝❤❛❝❦❛♠♠ ✷✵✵✶✮
  • ●r♦✉♣ s✐❣♥❛t✉r❡s s❝❤❡♠❡s ✭❇♦♥❡❤✱ ❙❝❤❛❝❦❛♠♠✱ ✷✵✵✹✮
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SLIDE 10

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊❧❧✐♣t✐❝ ❈✉r✈❡ ❈r②♣t♦❣r❛♣❤② ❛♥❞ ♣❛✐r✐♥❣s

■❞❡♥t✐t② ❇❛s❡❞ ❈r②♣t♦❣r❛♣❤② ✭■❇❈✮

❆♥ ■❞❡♥t✐t② ❇❛s❡❞ ♣r♦t♦❝♦❧ ✐s ❛♥ ❛s②♠❡tr✐❝ s②st❡♠ ✇❤❡r❡ ✿

  • ❚❤❡ ♣✉❜❧✐❝ ❦❡② ♦❢ ❆❧✐❝❡ ✐ts ❤❡r ✐❞❡♥t✐t②✱
  • ❤❡r ♣r✐✈❛t❡ ❑❡② ✐s ❝♦♥str✉❝t❡❞ ❜② ❛ ❚r✉st❡❞ ❛✉t❤♦r✐t②✳

❊①❛♠♣❧❡

❲❡ ✐❧❧✉str❛t❡ t❤❡ ♥♦t✐♦♥ ♦❢ ■❞❡♥t✐t② ❇❛s❡❞ ❈r②♣t♦❣r❛♣❤② ✇✐t❤ t❤❡ ❡①❛♠♣❧❡ ♦❢ ❛ ❦❡② ❡①❝❤❛♥❣❡ ❜❡t✇❡❡♥ ❆❧✐❝❡ ❛♥❞ ❇♦❜✳

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SLIDE 11

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

■❇❈

❙❡❝✉r❡ ❦❡② ❡①❝❤❛♥❣❡ ❜❡t✇❡❡♥ ❆❧✐❝❡ ❛♥❞ ❇♦❜

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SLIDE 12

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

■❇❈

❙❡❝✉r❡ ❦❡② ❡①❝❤❛♥❣❡ ❜❡t✇❡❡♥ ❆❧✐❝❡ ❛♥❞ ❇♦❜

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SLIDE 13

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

■❇❈

❙❡❝✉r❡ ❦❡② ❡①❝❤❛♥❣❡ ❜❡t✇❡❡♥ ❆❧✐❝❡ ❛♥❞ ❇♦❜

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SLIDE 14

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊❧❧✐♣t✐❝ ❈✉r✈❡ ❈r②♣t♦❣r❛♣❤② ❛♥❞ ♣❛✐r✐♥❣s

P❛✐r✐♥❣s ✉s❡❞

❋♦✉r ♣❛✐r✐♥❣s ❛r❡ ♣r✐♥❝✐♣❛❧❧② ✉s❡❞ ✐♥ ❝r②♣t♦❣r❛♣❤② ✿

  • t❤❡ ❲❡✐❧ ♣❛✐r✐♥❣✱
  • t❤❡ ❚❛t❡ ♣❛✐r✐♥❣✱
  • t❤❡ η❚ ♣❛✐r✐♥❣✱
  • t❤❡ ❆t❡ ♣❛✐r✐♥❣✳

❚❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❝♦♥str✉❝t✐♥❣ t❤❡ ❢✉♥❝t✐♦♥ ❢r,P ✐s ❛ ❝❡♥tr❛❧ st❡♣ ❢♦r t❤❡ ❲❡✐❧✱ ❚❛t❡ ❛♥❞ ❆t❡ ♣❛✐r✐♥❣s✳

slide-15
SLIDE 15

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♥str✉❝t✐♦♥ ♦❢ t❤❡ ♣❛✐r✐♥❣s

❉❛t❛

❚♦ ❝♦♠♣✉t❡ ❛ ♣❛✐r✐♥❣✱ ✇❡ ♥❡❡❞ t❤❡ ❢♦❧❧♦✇✐♥❣ ❡❧❡♠❡♥ts ✿

  • ❊ ❛♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡ ♦✈❡r Fq = {✵, ✶, ✷, . . . , q − ✶} ✿

❊ : ②✷ = ①✸ + ❛① + ❜✱ ✇❤❡r❡ ❛✱ ❜ ∈ Fq✳ r ❛ ♣r✐♠❡ ❞✐✈✐❞✐♥❣ ❝❛r❞ ❊

q

✱ ❝♦♥s✐❞❡r ❊ r ✿ ❊ r P ❊

q

r P P ✳ ❚❤❡ ❡♠❜❡❞❞✐♥❣ ❞❡❣r❡❡ ❦ ✿ ♠✐♥✐♠❛❧ ✐♥t❡❣❡r s✉❝❤ t❤❛t r q❦ ✶ ✿ ■❢ ❣❝❞ r q ✶✱ t❤❡♥ ❊ r r r ✱ ■❢ ❦ ✶ t❤❡♥ ❊ r ❊

q❦

r ✳ ❆ ❢✉♥❝t✐♦♥ ❢r P ❝♦♥str✉❝t❡❞ ✇✐t❤ t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠✳

slide-16
SLIDE 16

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♥str✉❝t✐♦♥ ♦❢ t❤❡ ♣❛✐r✐♥❣s

❉❛t❛

❚♦ ❝♦♠♣✉t❡ ❛ ♣❛✐r✐♥❣✱ ✇❡ ♥❡❡❞ t❤❡ ❢♦❧❧♦✇✐♥❣ ❡❧❡♠❡♥ts ✿

  • ❊ ❛♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡ ♦✈❡r Fq = {✵, ✶, ✷, . . . , q − ✶} ✿

❊ : ②✷ = ①✸ + ❛① + ❜✱ ✇❤❡r❡ ❛✱ ❜ ∈ Fq✳

  • r ❛ ♣r✐♠❡ ❞✐✈✐❞✐♥❣ ❝❛r❞(❊(Fq))✱

❝♦♥s✐❞❡r ❊[r] ✿ ❊[r] =

  • P ∈ ❊(Fq), [r]P = P∞

❚❤❡ ❡♠❜❡❞❞✐♥❣ ❞❡❣r❡❡ ❦ ✿ ♠✐♥✐♠❛❧ ✐♥t❡❣❡r s✉❝❤ t❤❛t r q❦ ✶ ✿ ■❢ ❣❝❞ r q ✶✱ t❤❡♥ ❊ r r r ✱ ■❢ ❦ ✶ t❤❡♥ ❊ r ❊

q❦

r ✳ ❆ ❢✉♥❝t✐♦♥ ❢r P ❝♦♥str✉❝t❡❞ ✇✐t❤ t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠✳

slide-17
SLIDE 17

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♥str✉❝t✐♦♥ ♦❢ t❤❡ ♣❛✐r✐♥❣s

❉❛t❛

❚♦ ❝♦♠♣✉t❡ ❛ ♣❛✐r✐♥❣✱ ✇❡ ♥❡❡❞ t❤❡ ❢♦❧❧♦✇✐♥❣ ❡❧❡♠❡♥ts ✿

  • ❊ ❛♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡ ♦✈❡r Fq = {✵, ✶, ✷, . . . , q − ✶} ✿

❊ : ②✷ = ①✸ + ❛① + ❜✱ ✇❤❡r❡ ❛✱ ❜ ∈ Fq✳

  • r ❛ ♣r✐♠❡ ❞✐✈✐❞✐♥❣ ❝❛r❞(❊(Fq))✱

❝♦♥s✐❞❡r ❊[r] ✿ ❊[r] =

  • P ∈ ❊(Fq), [r]P = P∞
  • ❚❤❡ ❡♠❜❡❞❞✐♥❣ ❞❡❣r❡❡ ❦ ✿ ♠✐♥✐♠❛❧ ✐♥t❡❣❡r s✉❝❤ t❤❛t

r|(q❦ − ✶) ✿ ■❢ ❣❝❞ r q ✶✱ t❤❡♥ ❊ r r r ✱ ■❢ ❦ ✶ t❤❡♥ ❊ r ❊

q❦

r ✳ ❆ ❢✉♥❝t✐♦♥ ❢r P ❝♦♥str✉❝t❡❞ ✇✐t❤ t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠✳

slide-18
SLIDE 18

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♥str✉❝t✐♦♥ ♦❢ t❤❡ ♣❛✐r✐♥❣s

❉❛t❛

❚♦ ❝♦♠♣✉t❡ ❛ ♣❛✐r✐♥❣✱ ✇❡ ♥❡❡❞ t❤❡ ❢♦❧❧♦✇✐♥❣ ❡❧❡♠❡♥ts ✿

  • ❊ ❛♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡ ♦✈❡r Fq = {✵, ✶, ✷, . . . , q − ✶} ✿

❊ : ②✷ = ①✸ + ❛① + ❜✱ ✇❤❡r❡ ❛✱ ❜ ∈ Fq✳

  • r ❛ ♣r✐♠❡ ❞✐✈✐❞✐♥❣ ❝❛r❞(❊(Fq))✱

❝♦♥s✐❞❡r ❊[r] ✿ ❊[r] =

  • P ∈ ❊(Fq), [r]P = P∞
  • ❚❤❡ ❡♠❜❡❞❞✐♥❣ ❞❡❣r❡❡ ❦ ✿ ♠✐♥✐♠❛❧ ✐♥t❡❣❡r s✉❝❤ t❤❛t

r|(q❦ − ✶) ✿ ■❢ ❣❝❞(r, q) = ✶✱ t❤❡♥ ❊[r] ∼ = Z/rZ × Z/rZ✱ ■❢ ❦ > ✶ t❤❡♥ ❊[r] = ❊(Fq❦)[r]✳ ❆ ❢✉♥❝t✐♦♥ ❢r P ❝♦♥str✉❝t❡❞ ✇✐t❤ t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠✳

slide-19
SLIDE 19

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♥str✉❝t✐♦♥ ♦❢ t❤❡ ♣❛✐r✐♥❣s

❉❛t❛

❚♦ ❝♦♠♣✉t❡ ❛ ♣❛✐r✐♥❣✱ ✇❡ ♥❡❡❞ t❤❡ ❢♦❧❧♦✇✐♥❣ ❡❧❡♠❡♥ts ✿

  • ❊ ❛♥ ❡❧❧✐♣t✐❝ ❝✉r✈❡ ♦✈❡r Fq = {✵, ✶, ✷, . . . , q − ✶} ✿

❊ : ②✷ = ①✸ + ❛① + ❜✱ ✇❤❡r❡ ❛✱ ❜ ∈ Fq✳

  • r ❛ ♣r✐♠❡ ❞✐✈✐❞✐♥❣ ❝❛r❞(❊(Fq))✱

❝♦♥s✐❞❡r ❊[r] ✿ ❊[r] =

  • P ∈ ❊(Fq), [r]P = P∞
  • ❚❤❡ ❡♠❜❡❞❞✐♥❣ ❞❡❣r❡❡ ❦ ✿ ♠✐♥✐♠❛❧ ✐♥t❡❣❡r s✉❝❤ t❤❛t

r|(q❦ − ✶) ✿ ■❢ ❣❝❞(r, q) = ✶✱ t❤❡♥ ❊[r] ∼ = Z/rZ × Z/rZ✱ ■❢ ❦ > ✶ t❤❡♥ ❊[r] = ❊(Fq❦)[r]✳

  • ❆ ❢✉♥❝t✐♦♥ ❢r,P ❝♦♥str✉❝t❡❞ ✇✐t❤ t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠✳
slide-20
SLIDE 20

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♥str✉❝t✐♦♥ ♦❢ t❤❡ ♣❛✐r✐♥❣s

❚❤❡ ❚❛t❡ ♣❛✐r✐♥❣

▲❡t P ∈ ❊(Fq)[r]✱ ◗ ∈ ❊(Fq❦)/r❊(Fq❦) ❛♥❞ ❦ ❜❡ t❤❡ ❡♠❜❡❞❞✐♥❣ ❞❡❣r❡❡ ♦❢ t❤❡ ❡❧❧✐♣t✐❝ ❝✉r✈❡✳ ❚❤❡ ❚❛t❡ ♣❛✐r✐♥❣ ✐s t❤❡ ❜✐❧✐♥❡❛r ♠❛♣ ✿ ❡❚ ❊

q r

q❦

r❊

q❦ q❦

P ◗ ❢r P ◗

q❦ ✶ r

slide-21
SLIDE 21

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♥str✉❝t✐♦♥ ♦❢ t❤❡ ♣❛✐r✐♥❣s

❚❤❡ ❚❛t❡ ♣❛✐r✐♥❣

▲❡t P ∈ ❊(Fq)[r]✱ ◗ ∈ ❊(Fq❦)/r❊(Fq❦) ❛♥❞ ❦ ❜❡ t❤❡ ❡♠❜❡❞❞✐♥❣ ❞❡❣r❡❡ ♦❢ t❤❡ ❡❧❧✐♣t✐❝ ❝✉r✈❡✳ ❚❤❡ ❚❛t❡ ♣❛✐r✐♥❣ ✐s t❤❡ ❜✐❧✐♥❡❛r ♠❛♣ ✿ ❡❚ : ❊(Fq)[r] × ❊(Fq❦)/r❊(Fq❦) → F∗

q❦

(P, ◗) → ❢r,P(◗)

q❦ −✶ r

slide-22
SLIDE 22

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❖✉t❧✐♥❡

P❛✐r✐♥❣s Pr♦♣❡rt✐❡s ♦❢ ♣❛✐r✐♥❣s P❛✐r✐♥❣ ❜❛s❡❞ ❝r②♣t♦❣r❛♣❤② ■❞❡♥t✐t② ❇❛s❡❞ ❈r②♣t♦❣r❛♣❤② ❈♦♥str✉❝t✐♦♥ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ Pr♦♣❡rt✐❡s ❈♦♥str✉❝t✐♦♥ ❋❛✉❧t ❛tt❛❝❦ ❉❡✜♥✐t✐♦♥ ❆❣❛✐♥st t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❈♦♥❝❧✉s✐♦♥

slide-23
SLIDE 23

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❚❤❡ ❢✉♥❝t✐♦♥ ❢r,P

■♥ ♦r❞❡r t♦ ❝♦♠♣✉t❡ t❤❡ ♣❛✐r✐♥❣s✱ ✇❡ ♥❡❡❞ t♦ ❝♦♠♣✉t❡ t❤❡ ❢✉♥❝t✐♦♥ ❢r,P✳ ❱✐❝t♦r ▼✐❧❧❡r✬s ❡st❛❜❧✐s❤❡❞ t❤❡ ▼✐❧❧❡r✬s ❡q✉❛t✐♦♥ ✿ ❢✐+❥,P = ❢✐,P × ❢❥,P × ❧[✐]P,[❥]P ✈[✐+❥]P ✇❤❡r❡ ❧ ✐ P

❥ P ✐s t❤❡ ❧✐♥❡ ❥♦✐♥✐♥❣ t❤❡ ♣♦✐♥ts ✐ P ❛♥❞ ❥ P✱

❛♥❞ ✈ ✐

❥ P ✐s t❤❡ ✈❡rt✐❝❛❧ ❧✐♥❡ ♣❛ss✐♥❣ t❤r♦✉❣❤ ♣♦✐♥t ✐

❥ P✳

slide-24
SLIDE 24

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❚❤❡ ❢✉♥❝t✐♦♥ ❢r,P

■♥ ♦r❞❡r t♦ ❝♦♠♣✉t❡ t❤❡ ♣❛✐r✐♥❣s✱ ✇❡ ♥❡❡❞ t♦ ❝♦♠♣✉t❡ t❤❡ ❢✉♥❝t✐♦♥ ❢r,P✳ ❱✐❝t♦r ▼✐❧❧❡r✬s ❡st❛❜❧✐s❤❡❞ t❤❡ ▼✐❧❧❡r✬s ❡q✉❛t✐♦♥ ✿ ❢✐+❥,P = ❢✐,P × ❢❥,P × ❧[✐]P,[❥]P ✈[✐+❥]P ✇❤❡r❡ ❧[✐]P+[❥]P ✐s t❤❡ ❧✐♥❡ ❥♦✐♥✐♥❣ t❤❡ ♣♦✐♥ts [✐]P ❛♥❞ [❥]P✱ ❛♥❞ ✈ ✐

❥ P ✐s t❤❡ ✈❡rt✐❝❛❧ ❧✐♥❡ ♣❛ss✐♥❣ t❤r♦✉❣❤ ♣♦✐♥t ✐

❥ P✳

slide-25
SLIDE 25

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❚❤❡ ❢✉♥❝t✐♦♥ ❢r,P

■♥ ♦r❞❡r t♦ ❝♦♠♣✉t❡ t❤❡ ♣❛✐r✐♥❣s✱ ✇❡ ♥❡❡❞ t♦ ❝♦♠♣✉t❡ t❤❡ ❢✉♥❝t✐♦♥ ❢r,P✳ ❱✐❝t♦r ▼✐❧❧❡r✬s ❡st❛❜❧✐s❤❡❞ t❤❡ ▼✐❧❧❡r✬s ❡q✉❛t✐♦♥ ✿ ❢✐+❥,P = ❢✐,P × ❢❥,P × ❧[✐]P,[❥]P ✈[✐+❥]P ✇❤❡r❡ ❧[✐]P+[❥]P ✐s t❤❡ ❧✐♥❡ ❥♦✐♥✐♥❣ t❤❡ ♣♦✐♥ts [✐]P ❛♥❞ [❥]P✱ ❛♥❞ ✈[✐+❥]P ✐s t❤❡ ✈❡rt✐❝❛❧ ❧✐♥❡ ♣❛ss✐♥❣ t❤r♦✉❣❤ ♣♦✐♥t [✐ + ❥]P✳

slide-26
SLIDE 26

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊①❛♠♣❧❡

❲❡ ✇❛♥t t♦ ❝♦♠♣✉t❡ ❢✼,P ✿ ✼ ❂ ✻ ✰ ✶ ❢✼ P ❢✻ P ❢✶ P

❧ ✻ P P ✈ ✼ P

❢✶ P ✶ ❢✼ P ❢✻ P

❧ ✻ P P ✈ ✼ P

❢✻ P ❢✸ P ❢✸ P

❧ ✸ P ✸ P ✈ ✻ P

✇❤❡♥ ✐ ❥✱ t❤❡ ❧✐♥❡ ❧ ✐s t❤❡ t❛♥❣❡♥t ❛t ♣♦✐♥t ✐ P ❢✻ P ❢ ✷

✸ P ❧ ✸ P ✸ P ✈ ✻ P

❢✼ P ❢ ✷

✸ P ❧ ✸ P ✸ P ✈ ✻ P ❧ ✻ P P ✈ ✼ P

slide-27
SLIDE 27

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊①❛♠♣❧❡

❲❡ ✇❛♥t t♦ ❝♦♠♣✉t❡ ❢✼,P ✿

  • ✼ ❂ ✻ ✰ ✶

❢✼ P ❢✻ P ❢✶ P

❧ ✻ P P ✈ ✼ P

❢✶ P ✶ ❢✼ P ❢✻ P

❧ ✻ P P ✈ ✼ P

❢✻ P ❢✸ P ❢✸ P

❧ ✸ P ✸ P ✈ ✻ P

✇❤❡♥ ✐ ❥✱ t❤❡ ❧✐♥❡ ❧ ✐s t❤❡ t❛♥❣❡♥t ❛t ♣♦✐♥t ✐ P ❢✻ P ❢ ✷

✸ P ❧ ✸ P ✸ P ✈ ✻ P

❢✼ P ❢ ✷

✸ P ❧ ✸ P ✸ P ✈ ✻ P ❧ ✻ P P ✈ ✼ P

slide-28
SLIDE 28

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊①❛♠♣❧❡

❲❡ ✇❛♥t t♦ ❝♦♠♣✉t❡ ❢✼,P ✿

  • ✼ ❂ ✻ ✰ ✶
  • ❢✼,P = ❢✻,P × ❢✶,P ×

❧[✻]P,P ✈[✼]P

❢✶ P ✶ ❢✼ P ❢✻ P

❧ ✻ P P ✈ ✼ P

❢✻ P ❢✸ P ❢✸ P

❧ ✸ P ✸ P ✈ ✻ P

✇❤❡♥ ✐ ❥✱ t❤❡ ❧✐♥❡ ❧ ✐s t❤❡ t❛♥❣❡♥t ❛t ♣♦✐♥t ✐ P ❢✻ P ❢ ✷

✸ P ❧ ✸ P ✸ P ✈ ✻ P

❢✼ P ❢ ✷

✸ P ❧ ✸ P ✸ P ✈ ✻ P ❧ ✻ P P ✈ ✼ P

slide-29
SLIDE 29

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊①❛♠♣❧❡

❲❡ ✇❛♥t t♦ ❝♦♠♣✉t❡ ❢✼,P ✿

  • ✼ ❂ ✻ ✰ ✶
  • ❢✼,P = ❢✻,P × ❢✶,P ×

❧[✻]P,P ✈[✼]P

❢✶,P = ✶ ❢✼,P = ❢✻,P ×

❧[✻]P,P ✈[✼]P

❢✻ P ❢✸ P ❢✸ P

❧ ✸ P ✸ P ✈ ✻ P

✇❤❡♥ ✐ ❥✱ t❤❡ ❧✐♥❡ ❧ ✐s t❤❡ t❛♥❣❡♥t ❛t ♣♦✐♥t ✐ P ❢✻ P ❢ ✷

✸ P ❧ ✸ P ✸ P ✈ ✻ P

❢✼ P ❢ ✷

✸ P ❧ ✸ P ✸ P ✈ ✻ P ❧ ✻ P P ✈ ✼ P

slide-30
SLIDE 30

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊①❛♠♣❧❡

❲❡ ✇❛♥t t♦ ❝♦♠♣✉t❡ ❢✼,P ✿

  • ✼ ❂ ✻ ✰ ✶
  • ❢✼,P = ❢✻,P × ❢✶,P ×

❧[✻]P,P ✈[✼]P

❢✶,P = ✶ ❢✼,P = ❢✻,P ×

❧[✻]P,P ✈[✼]P

  • ❢✻,P = ❢✸,P × ❢✸,P ×

❧[✸]P,[✸]P ✈[✻]P

✇❤❡♥ ✐ = ❥✱ t❤❡ ❧✐♥❡ ❧ ✐s t❤❡ t❛♥❣❡♥t ❛t ♣♦✐♥t [✐]P ❢✻ P ❢ ✷

✸ P ❧ ✸ P ✸ P ✈ ✻ P

❢✼ P ❢ ✷

✸ P ❧ ✸ P ✸ P ✈ ✻ P ❧ ✻ P P ✈ ✼ P

slide-31
SLIDE 31

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊①❛♠♣❧❡

❲❡ ✇❛♥t t♦ ❝♦♠♣✉t❡ ❢✼,P ✿

  • ✼ ❂ ✻ ✰ ✶
  • ❢✼,P = ❢✻,P × ❢✶,P ×

❧[✻]P,P ✈[✼]P

❢✶,P = ✶ ❢✼,P = ❢✻,P ×

❧[✻]P,P ✈[✼]P

  • ❢✻,P = ❢✸,P × ❢✸,P ×

❧[✸]P,[✸]P ✈[✻]P

✇❤❡♥ ✐ = ❥✱ t❤❡ ❧✐♥❡ ❧ ✐s t❤❡ t❛♥❣❡♥t ❛t ♣♦✐♥t [✐]P

  • ❢✻,P = ❢ ✷

✸,P × ❧[✸]P,[✸]P ✈[✻]P

❢✼,P = ❢ ✷

✸,P × ❧[✸]P,[✸]P ✈[✻]P

×

❧[✻]P,P ✈[✼]P

slide-32
SLIDE 32

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊①❛♠♣❧❡

❲❡ ✇❛♥t t♦ ❝♦♠♣✉t❡ ❢✼,P ✿

  • ❢✼,P = ❢ ✷

✸,P × ❧[✸]P,[✸]P ✈[✻]P

×

❧[✻]P,P ✈[✼]P

❢✸ P ❢✷ P ❢✶ P

❧ ✷ P P ✈ ✸ P

❢✸ P ❢✷ P

❧ ✷ P P ✈ ✸ P

❢✷ P ❢✶ P ❢✶ P

❧P P ✈ ✷ P

❢✼ P

❧P P ✈ ✷ P ❧ ✷ P P ✈ ✸ P ✷ ❧ ✸ P ✸ P ✈ ✻ P ❧ ✻ P P ✈ ✼ P

slide-33
SLIDE 33

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊①❛♠♣❧❡

❲❡ ✇❛♥t t♦ ❝♦♠♣✉t❡ ❢✼,P ✿

  • ❢✼,P = ❢ ✷

✸,P × ❧[✸]P,[✸]P ✈[✻]P

×

❧[✻]P,P ✈[✼]P

  • ❢✸,P = ❢✷,P × ❢✶,P ×

❧[✷]P,P ✈[✸]P

❢✸,P = ❢✷,P ×

❧[✷]P,P ✈[✸]P

  • ❢✷,P = ❢✶,P × ❢✶,P × ❧P,P

✈[✷]P

❢✼ P

❧P P ✈ ✷ P ❧ ✷ P P ✈ ✸ P ✷ ❧ ✸ P ✸ P ✈ ✻ P ❧ ✻ P P ✈ ✼ P

slide-34
SLIDE 34

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❊①❛♠♣❧❡

❲❡ ✇❛♥t t♦ ❝♦♠♣✉t❡ ❢✼,P ✿

  • ❢✼,P = ❢ ✷

✸,P × ❧[✸]P,[✸]P ✈[✻]P

×

❧[✻]P,P ✈[✼]P

  • ❢✸,P = ❢✷,P × ❢✶,P ×

❧[✷]P,P ✈[✸]P

❢✸,P = ❢✷,P ×

❧[✷]P,P ✈[✸]P

  • ❢✷,P = ❢✶,P × ❢✶,P × ❧P,P

✈[✷]P

  • ❢✼,P =

❧P,P

✈[✷]P × ❧[✷]P,P ✈[✸]P

✷ ×

❧[✸]P,[✸]P ✈[✻]P

×

❧[✻]P,P ✈[✼]P

slide-35
SLIDE 35

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♠♣✉t❛t✐♦♥ ♦❢ ♣❛✐r✐♥❣s

❉❛t❛✿ r = (r♥ . . . r✵)✷✱ P ∈ ❊(Fq) ❛♥❞ ◗ ∈ ❊(Fq❦) ❀ ❘❡s✉❧t✿ ❢r,P(◗) ∈ F∗

q❦ ❀

✶ ✿ ❚ ← P ✱ ❢✶ ← ✶✱ ❢✷ ← ✶ ❀ ❢♦r ✐ = ♥ − ✶ t♦ ✵ ❞♦ ✷ ✿ ❚ ✷ ❚ ❀ ✸ ✿ ❢✶ ❢✶

❤✶ ◗ ❀ ✹ ✿ ❢✷ ❢✷

✈✷ ◗ ❀ ✐❢ r✐ = ✶ t❤❡♥ ✺ ✿ ❚ ❚ P ❀ ❀ ❀ ❡♥❞ ❡♥❞ r❡t✉r♥

slide-36
SLIDE 36

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♠♣✉t❛t✐♦♥ ♦❢ ♣❛✐r✐♥❣s

❉❛t❛✿ r = (r♥ . . . r✵)✷✱ P ∈ ❊(Fq) ❛♥❞ ◗ ∈ ❊(Fq❦) ❀ ❘❡s✉❧t✿ ❢r,P(◗) ∈ F∗

q❦ ❀

✶ ✿ ❚ ← P ✱ ❢✶ ← ✶✱ ❢✷ ← ✶ ❀ ❢♦r ✐ = ♥ − ✶ t♦ ✵ ❞♦ ✷ ✿ ❚ ← [✷]❚ ❀ ✸ ✿ ❢✶ ❢✶

❤✶ ◗ ❀ ✹ ✿ ❢✷ ❢✷

✈✷ ◗ ❀ ✐❢ r✐ = ✶ t❤❡♥ ✺ ✿ ❚ ← ❚ + P ❀ ❀ ❀ ❡♥❞ ❡♥❞ r❡t✉r♥

slide-37
SLIDE 37

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♠♣✉t❛t✐♦♥ ♦❢ ♣❛✐r✐♥❣s

❉❛t❛✿ r = (r♥ . . . r✵)✷✱ P ∈ ❊(Fq) ❛♥❞ ◗ ∈ ❊(Fq❦) ❀ ❘❡s✉❧t✿ ❢r,P(◗) ∈ F∗

q❦ ❀

✶ ✿ ❚ ← P ✱ ❢✶ ← ✶✱ ❢✷ ← ✶ ❀ ❢♦r ✐ = ♥ − ✶ t♦ ✵ ❞♦ ✷ ✿ ❚ ← [✷]❚ ❀ ✸ ✿ ❢✶ ← − ❢✶

✷ × ❤✶(◗) ❀

✹ ✿ ❢✷ ← − ❢✷

✷ × ✈✷(◗) ❀

✐❢ r✐ = ✶ t❤❡♥ ✺ ✿ ❚ ← ❚ + P ❀ ❀ ❀ ❡♥❞ ❡♥❞ r❡t✉r♥

slide-38
SLIDE 38

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♠♣✉t❛t✐♦♥ ♦❢ ♣❛✐r✐♥❣s

❉❛t❛✿ r = (r♥ . . . ❧✵)✷✱ P ∈ ❊(Fq) ❛♥❞ ◗ ∈ ❊(Fq❦) ❀ ❘❡s✉❧t✿ ❢r,P(◗) ∈ F∗

q❦ ❀

✶ ✿ ❚ ← P ✱ ❢✶ ← ✶✱ ❢✷ ← ✶ ❀ ❢♦r ✐ = ♥ − ✶ t♦ ✵ ❞♦ ✷ ✿ ❚ ← [✷]❚❀ ✸ ✿ ❢✶ ← − ❢✶

✷ × ❤❞(◗) ❀

✹ ✿ ❢✷ ← − ❢✷

✷ × ✈❞(◗) ❀

✐❢ r✐ = ✶ t❤❡♥ ✺ ✿ ❚ ← ❚ + P ❀ ✻ ✿ ❢✶ ← − ❢✶ × ❤❛(◗) ❀ ✼ ✿ ❢✷ ← − ❢✷ × ✈❛(◗)❀ ❡♥❞ ❡♥❞ r❡t✉r♥

slide-39
SLIDE 39

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♠♣✉t❛t✐♦♥ ♦❢ ♣❛✐r✐♥❣s

❉❛t❛✿ r = (r♥ . . . ❧✵)✷✱ P ∈ ❊(Fq) ❛♥❞ ◗ ∈ ❊(Fq❦) ❀ ❘❡s✉❧t✿ ❢r,P(◗) ∈ F∗

q❦ ❀

✶ ✿ ❚ ← P ✱ ❢✶ ← ✶✱ ❢✷ ← ✶ ❀ ❢♦r ✐ = ♥ − ✶ t♦ ✵ ❞♦ ✷ ✿ ❚ ← [✷]❚❀ ✸ ✿ ❢✶ ← − ❢✶

✷ × ❤❞(◗) ❀

✹ ✿ ❢✷ ← − ❢✷

✷ × ✈❞(◗) ❀

✐❢ r✐ = ✶ t❤❡♥ ✺ ✿ ❚ ← ❚ + P ❀ ✻ ✿ ❢✶ ← − ❢✶ × ❤❛(◗) ❀ ✼ ✿ ❢✷ ← − ❢✷ × ✈❛(◗)❀ ❡♥❞ ❡♥❞ r❡t✉r♥

❢✶ ❢✷

slide-40
SLIDE 40

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❖✉t❧✐♥❡

P❛✐r✐♥❣s Pr♦♣❡rt✐❡s ♦❢ ♣❛✐r✐♥❣s P❛✐r✐♥❣ ❜❛s❡❞ ❝r②♣t♦❣r❛♣❤② ■❞❡♥t✐t② ❇❛s❡❞ ❈r②♣t♦❣r❛♣❤② ❈♦♥str✉❝t✐♦♥ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ Pr♦♣❡rt✐❡s ❈♦♥str✉❝t✐♦♥ ❋❛✉❧t ❛tt❛❝❦ ❉❡✜♥✐t✐♦♥ ❆❣❛✐♥st t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❈♦♥❝❧✉s✐♦♥

slide-41
SLIDE 41

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❙✐❞❡ ❈❤❛♥♥❡❧ ❆tt❛❝❦s

■♥ ❛♥ ■❞❡♥t✐t② ❇❛s❡❞ ♣r♦t♦❝♦❧ ✿

  • ❛♥ ❛tt❛❝❦❡r ❦♥♦✇s t❤❡ ❛❧❣♦r✐t❤♠ ✉s❡❞ ❛♥❞
  • t❤❡ ♥✉♠❜❡r ♦❢ ✐t❡r❛t✐♦♥s✳
  • ❚❤❡ s❡❝r❡t ✐s ♦♥❧② ♦♥❡ ♦❢ t❤❡ ❛r❣✉♠❡♥ts ♦❢ t❤❡ ♣❛✐r✐♥❣✳
  • ❚❤❡ s❡❝r❡t ❦❡② ✐♥✢✉❡♥❝❡s ♥❡✐t❤❡r t❤❡ ❡①❡❝✉t✐♦♥ t✐♠❡ ♥♦r t❤❡

♥✉♠❜❡r ♦❢ ✐t❡r❛t✐♦♥s ♦❢ t❤❡ ❛❧❣♦r✐t❤♠✳

slide-42
SLIDE 42

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❙✐❞❡ ❈❤❛♥♥❡❧ ❆tt❛❝❦s

  • ❙✐❞❡ ❈❤❛♥♥❡❧ ❆tt❛❝❦s ❛r❡ ❛tt❛❝❦s ❜❛s❡❞ ♦♥ ✐♥❢♦r♠❛t✐♦♥ ❣❛✐♥❡❞

❢r♦♠ t❤❡ ♣❤②s✐❝❛❧ ✐♠♣❧❡♠❡♥t❛t✐♦♥ ♦❢ ❛ ❝r②♣t♦s②st❡♠✳

  • ❋❛✉❧t ❛tt❛❝❦s ❛r❡ s✉❝❤ t❤❛t t❤❡ s❡❝r❡t ✐s ❞✐s❝♦✈❡r❡❞ ❜②

✐♥tr♦❞✉❝✐♥❣ ❢❛✉❧ts ❞✉r✐♥❣ t❤❡ ❝♦♠♣✉t❛t✐♦♥✳

  • ❚❤❡r❡ ✇❡r❡ ✜rst ✐♥tr♦❞✉✐❝❡❞ ✐♥ ✷✵✵✻ ❜② P❛❣❡ ❛♥❞ ❱❡r❝❛✉t❡r❡♥

❛❣❛✐♥st t❤❡ ❉✉✉rs♠❛ ❛♥❞ ▲❡❡ ❛❧❣♦r✐t❤♠✳

slide-43
SLIDE 43

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❉❡s❝r✐♣t✐♦♥ ♦❢ t❤❡ ❢❛✉❧t ❛tt❛❝❦

  • ❲❡ ❛ss✉♠❡ t❤❛t t❤❡ ♣❛✐r✐♥❣ ✐s ✉s❡❞ ❞✉r✐♥❣ ❛♥ ■❞❡♥t✐t② ❇❛s❡❞

Pr♦t♦❝♦❧✳

  • ❚❤❡ s❡❝r❡t ✐s t❤❡ ♣♦✐♥t P✱ ✜rst ❛r❣✉♠❡♥t ♦❢ t❤❡ ♣❛✐r✐♥❣

❡(P, ◗)✳

❆✐♠ ♦❢ t❤❡ ❢❛✉❧t ❛tt❛❝❦

❚❤❡ ❛tt❛❝❦ ❝♦♥s✐sts ✐♥ ♠♦❞✐❢②✐♥❣ t❤❡ ♥✉♠❜❡r ♦❢ ✐t❡r❛t✐♦♥s ✭❧♦❣✷(r)✮ ❞✉r✐♥❣ t❤❡ ❡①❡❝✉t✐♦♥ ♦❢ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ✐♥ ♦r❞❡r t♦ ✜♥❞ t✇♦ ❡①❡❝✉t✐♦♥s ✇✐t❤ ❝♦♥s❡❝✉t✐✈❡ ♥✉♠❜❡rs ♦❢ ✐t❡r❛t✐♦♥s ✿ ❧ ❛♥❞ ❧ + ✶ ❢♦r ❧ ∈ {✶, . . . , ❧♦❣✷(r) − ✶}✳ ❲❡ ♥♦t❡ ❋❧,P(◗) ❛♥❞ ❋❧+✶,P(◗) t❤❡ t✇♦ r❡s✉❧ts✳

slide-44
SLIDE 44

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❚❤❡ r❛t✐♦ ❘ = ❋❧+✶,P(◗)

❋❧,P(◗)

❚❤❡ r❛t✐♦ ❘ = ❋❧+✶,P(◗)

❋❧,P(◗)

❣✐✈❡s ✐♥❢♦r♠❛t✐♦♥ ❛❜♦✉t t❤❡ s❡❝r❡t✳

  • ❆t t❤❡ ❧✲t❤ st❡♣✱ ❚ = [❥]P ✐♥ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠✳
  • ❲❡ ❞❡♥♦t❡ [❥]P = (❳❥, ❨❥, ❩❥) t❤❡ s❡❝r❡t ♣♦✐♥t ❛♥❞

◗ = (①◗, ②◗) t❤❡ ❦♥♦✇♥ ❡♥tr② ♦❢ ❡(P, ◗)✳ ❲r✐t✐♥❣ ❞♦✇♥ t❤❡ ❡q✉❛t✐♦♥✱ t❤❡ r❛t✐♦ ❘ ❡q✉❛❧s ✿

  • ❩✷❥❩ ✷

❥ ②◗ − ✷❨ ✷ ❥ − ✸(❳❥ − ❩ ✷ ❥ )(❳❥ + ❩ ✷ ❥ )(①◗❩ ✷ ❥ − ❳❥)

  • .

❲✐t❤ t❤❡ ❦♥♦✇❧❡❞❣❡ ♦❢ t❤❡ t❤❡♦r❡t✐❝❛❧ ❞❡✈❡❧♦♣♣❡♠❡♥t ♦❢ ❘ ❛♥❞ ✐ts ✈❛❧✉❡✱ ✇❡ ♦❜t❛✐♥ ❛ s②st❡♠ ✐♥ t❤❡ ❝♦♦r❞✐♥❛t❡s ♦❢ [❥]P✳

slide-45
SLIDE 45

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❚❤❡ r❛t✐♦ ❘ = ❋❧+✶,P(◗)

❋❧,P(◗)

❚❤❡ s②st❡♠ ✐s ✿ ❨❥❩ ✸

❥ = λ✷

✭✶✮ ❩ ✷

❥ (❳ ✷ ❥ − ❩ ✹ ❥ ) = λ✶

✭✷✮ ✸❳❥(❳ ✷

❥ − ❩ ✹ ❥ ) + ✷❨ ✷ ❥ = λ✵

✭✸✮        ❲❤❡r❡ ✇❡ ❦♥♦✇ t❤❡ ✈❛❧✉❡ ♦❢ λ✵✱ λ✶ ❛♥❞ λ✷✳ ❚❤❡ r❡s♦❧✉t✐♦♥ ♦❢ t❤✐s s②st❡♠ ❝♦✉❧❞ ❜❡ ❢♦r ❡①❛♠♣❧❡ t❤❡ ❢♦❧❧♦✇✐♥❣✳ ✶✳ ❯s❡ ❡q✉❛t✐♦♥ ✶ t♦ ♦❜t❛✐♥ ❨❥ ❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳ ✷✳ ❯s❡ ❡q✉❛t✐♦♥ ✷ t♦ ♦❜t❛✐♥ ✸ ❳ ✷

❩ ✹

❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳ ✸✳ ❙✉❜st✐t✉t❡ t❤✐s ❡①♣r❡ss✐♦♥ ✐♥ ❡q✉❛t✐♦♥ ✸ t♦ ♦❜t❛✐♥ ❳❥ ❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳ ✹✳ ❙✉❜st✐t✉t❡ ❳❥ ✐♥ ❡q✉❛t✐♦♥ ✷ t♦ ♦❜t❛✐♥ ❛ ❞❡❣r❡❡ ✶✷ ❡q✉❛t✐♦♥ ✐♥ ❩❥✳

✷ ✵

✾ ✷

✶ ❩ ✶✷

✹ ✵

✷ ✷

✾ ✸

✶ ❩ ✻

✹ ✹

slide-46
SLIDE 46

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❚❤❡ r❛t✐♦ ❘ = ❋❧+✶,P(◗)

❋❧,P(◗)

❚❤❡ s②st❡♠ ✐s ✿ ❨❥❩ ✸

❥ = λ✷

✭✶✮ ❩ ✷

❥ (❳ ✷ ❥ − ❩ ✹ ❥ ) = λ✶

✭✷✮ ✸❳❥(❳ ✷

❥ − ❩ ✹ ❥ ) + ✷❨ ✷ ❥ = λ✵

✭✸✮        ❲❤❡r❡ ✇❡ ❦♥♦✇ t❤❡ ✈❛❧✉❡ ♦❢ λ✵✱ λ✶ ❛♥❞ λ✷✳ ❚❤❡ r❡s♦❧✉t✐♦♥ ♦❢ t❤✐s s②st❡♠ ❝♦✉❧❞ ❜❡ ❢♦r ❡①❛♠♣❧❡ t❤❡ ❢♦❧❧♦✇✐♥❣✳ ✶✳ ❯s❡ ❡q✉❛t✐♦♥ ✶ t♦ ♦❜t❛✐♥ ❨❥ ❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳ ✷✳ ❯s❡ ❡q✉❛t✐♦♥ ✷ t♦ ♦❜t❛✐♥ ✸ ❳ ✷

❩ ✹

❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳ ✸✳ ❙✉❜st✐t✉t❡ t❤✐s ❡①♣r❡ss✐♦♥ ✐♥ ❡q✉❛t✐♦♥ ✸ t♦ ♦❜t❛✐♥ ❳❥ ❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳ ✹✳ ❙✉❜st✐t✉t❡ ❳❥ ✐♥ ❡q✉❛t✐♦♥ ✷ t♦ ♦❜t❛✐♥ ❛ ❞❡❣r❡❡ ✶✷ ❡q✉❛t✐♦♥ ✐♥ ❩❥✳

✷ ✵

✾ ✷

✶ ❩ ✶✷

✹ ✵

✷ ✷

✾ ✸

✶ ❩ ✻

✹ ✹

slide-47
SLIDE 47

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❚❤❡ r❛t✐♦ ❘ = ❋❧+✶,P(◗)

❋❧,P(◗)

❚❤❡ s②st❡♠ ✐s ✿ ❨❥❩ ✸

❥ = λ✷

✭✶✮ ❩ ✷

❥ (❳ ✷ ❥ − ❩ ✹ ❥ ) = λ✶

✭✷✮ ✸❳❥(❳ ✷

❥ − ❩ ✹ ❥ ) + ✷❨ ✷ ❥ = λ✵

✭✸✮        ❲❤❡r❡ ✇❡ ❦♥♦✇ t❤❡ ✈❛❧✉❡ ♦❢ λ✵✱ λ✶ ❛♥❞ λ✷✳ ❚❤❡ r❡s♦❧✉t✐♦♥ ♦❢ t❤✐s s②st❡♠ ❝♦✉❧❞ ❜❡ ❢♦r ❡①❛♠♣❧❡ t❤❡ ❢♦❧❧♦✇✐♥❣✳ ✶✳ ❯s❡ ❡q✉❛t✐♦♥ (✶) t♦ ♦❜t❛✐♥ ❨❥ ❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳ ✷✳ ❯s❡ ❡q✉❛t✐♦♥ (✷) t♦ ♦❜t❛✐♥ ✸(❳ ✷

❥ − ❩ ✹ ❥ ) ❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳

✸✳ ❙✉❜st✐t✉t❡ t❤✐s ❡①♣r❡ss✐♦♥ ✐♥ ❡q✉❛t✐♦♥ (✸) t♦ ♦❜t❛✐♥ ❳❥ ❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳ ✹✳ ❙✉❜st✐t✉t❡ ❳❥ ✐♥ ❡q✉❛t✐♦♥ (✷) t♦ ♦❜t❛✐♥ ❛ ❞❡❣r❡❡ ✶✷ ❡q✉❛t✐♦♥ ✐♥ ❩❥✳

✷ ✵

✾ ✷

✶ ❩ ✶✷

✹ ✵

✷ ✷

✾ ✸

✶ ❩ ✻

✹ ✹

slide-48
SLIDE 48

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❚❤❡ r❛t✐♦ ❘ = ❋❧+✶,P(◗)

❋❧,P(◗)

❚❤❡ s②st❡♠ ✐s ✿ ❨❥❩ ✸

❥ = λ✷

✭✶✮ ❩ ✷

❥ (❳ ✷ ❥ − ❩ ✹ ❥ ) = λ✶

✭✷✮ ✸❳❥(❳ ✷

❥ − ❩ ✹ ❥ ) + ✷❨ ✷ ❥ = λ✵

✭✸✮        ❲❤❡r❡ ✇❡ ❦♥♦✇ t❤❡ ✈❛❧✉❡ ♦❢ λ✵✱ λ✶ ❛♥❞ λ✷✳ ❚❤❡ r❡s♦❧✉t✐♦♥ ♦❢ t❤✐s s②st❡♠ ❝♦✉❧❞ ❜❡ ❢♦r ❡①❛♠♣❧❡ t❤❡ ❢♦❧❧♦✇✐♥❣✳ ✶✳ ❯s❡ ❡q✉❛t✐♦♥ (✶) t♦ ♦❜t❛✐♥ ❨❥ ❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳ ✷✳ ❯s❡ ❡q✉❛t✐♦♥ (✷) t♦ ♦❜t❛✐♥ ✸(❳ ✷

❥ − ❩ ✹ ❥ ) ❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳

✸✳ ❙✉❜st✐t✉t❡ t❤✐s ❡①♣r❡ss✐♦♥ ✐♥ ❡q✉❛t✐♦♥ (✸) t♦ ♦❜t❛✐♥ ❳❥ ❛s ❛ ❢✉♥❝t✐♦♥ ♦❢ ❩❥✳ ✹✳ ❙✉❜st✐t✉t❡ ❳❥ ✐♥ ❡q✉❛t✐♦♥ (✷) t♦ ♦❜t❛✐♥ ❛ ❞❡❣r❡❡ ✶✷ ❡q✉❛t✐♦♥ ✐♥ ❩❥✳ (λ✷

✵ − ✾λ✷ ✶)❩ ✶✷ − (✹λ✵λ✷ ✷ + ✾λ✸ ✶)❩ ✻ + ✹λ✹ ✶ = ✵

slide-49
SLIDE 49

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❖✉t❧✐♥❡

P❛✐r✐♥❣s Pr♦♣❡rt✐❡s ♦❢ ♣❛✐r✐♥❣s P❛✐r✐♥❣ ❜❛s❡❞ ❝r②♣t♦❣r❛♣❤② ■❞❡♥t✐t② ❇❛s❡❞ ❈r②♣t♦❣r❛♣❤② ❈♦♥str✉❝t✐♦♥ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ Pr♦♣❡rt✐❡s ❈♦♥str✉❝t✐♦♥ ❋❛✉❧t ❛tt❛❝❦ ❉❡✜♥✐t✐♦♥ ❆❣❛✐♥st t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❈♦♥❝❧✉s✐♦♥

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SLIDE 50

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❈♦♥❝❧✉s✐♦♥

❚❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ✐s ✈✉❧♥❡r❛❜❧❡ t♦ ❛ ❢❛✉❧t ❛tt❛❝❦✳

❱✉❧♥❡r❛❜✐❧✐t② ♦❢ ♣❛✐r✐♥❣s ❜❛s❡❞ ♦♥ t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠

❚❤❡ ❲❡✐❧ ♣❛✐r✐♥❣ ✐s ❞✐r❡❝t❧② s❡♥s✐t✐✈❡ t♦ t❤❡ ❛tt❛❝❦✳ ❚❤❡ ❚❛t❡ ❛♥❞ ❆t❡ ♣❛✐r✐♥❣s ❛r❡ ❝♦♥str✉❝t❡❞ ♦♥ t❤❡ s❛♠❡ ♠♦❞❡❧✱ ♦♥❡ ❡①❡❝✉t✐♦♥ ♦❢ t❤❡ ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ♣❧✉s ❛ ✜♥❛❧ ❡①♣♦♥❡♥t✐❛t✐♦♥✳ ❚❤❡ ✜♥❛❧ ❡①♣♦♥❡♥t✐❛t✐♦♥ ✐s ❛ ❝♦✉♥t❡r✲♠❡❛s✉r❡ t♦ t❤✐s ❢❛✉❧t ❛tt❛❝❦✳ ■t ✐s ♣♦ss✐❜❧❡ t♦ ♦✈❡rr✐❞❡ ✐t ✉s✐♥❣ ❛ s❝❛♥ ❛tt❛❝❦ ♦r t❤❡ ✉♥❞❡r ✈♦❧t❛❣❡ t❡❝❤♥✐q✉❡✳

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SLIDE 51

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❚❤❡ ❡♥❞ ❚❤❛♥❦ ②♦✉ ❢♦r ②♦✉r ❛tt❡♥t✐♦♥✳ ❆♥② q✉❡st✐♦♥ ❄

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SLIDE 52

P❛✐r✐♥❣s ▼✐❧❧❡r✬s ❛❧❣♦r✐t❤♠ ❋❛✉❧t ❛tt❛❝❦ ❈♦♥❝❧✉s✐♦♥

❚❤❡ ♣r♦❜❛❜✐❧✐t②

❚❤❡ ♥✉♠❜❡r ❇(♥, ◆) ♦❢ ♣♦ss✐❜❧❡ ♣✐❝❦s ♦❢ ♥ ♥✉♠❜❡rs ❛♠♦♥❣ ◆ ✐♥t❡❣❡rs ✇✐t❤ ♥♦ ❝♦♥s❡❝✉t✐✈❡ ♥✉♠❜❡r ✐s ❣✐✈❡♥ ❜② t❤❡ ❢♦❧❧♦✇✐♥❣ r❡❝✉rr❡♥❝❡ ❢♦r♠✉❧❛ ✿    ◆ ≤ ✵, ♥ > ✵, ❇(♥, ◆) = ✵, ∀◆, ♥ = ✵❇(♥, ◆) = ✶ ❇(♥, ◆) = ◆

❥=✶

❦=✶ ❇(♥ − ❦, ❥ − ✷).

❲✐t❤ t❤✐s ❢♦r♠✉❧❛✱ ✇❡ ❝❛♥ ❝♦♠♣✉t❡ t❤❡ ♣r♦❜❛❜✐❧✐t② t♦ ♦❜t❛✐♥ t✇♦ ❝♦♥s❡❝✉t✐✈❡ ♥✉♠❜❡rs ❛❢t❡r ♥ ♣✐❝❦s ❛♠♦♥❣ ◆ ✐♥t❡❣❡rs✳ ❚❤✐s ♣r♦❜❛❜✐❧✐t② P(♥, ◆) ✐s P(♥, ◆) = ✶ − ❇(♥, ◆) ❈ ♥

♥+◆

❊①❛♠♣❧❡✱ ❢♦r ❛♥ ✽✲❜✐ts ❛r❝❤✐t❡❝t✉r❡ P(✶✺, ✷✽) = ✵.✺✻✳