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January 4, 2025 11:20
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DeepSeek v3 の生成結果
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using AbstractAlgebra | |
# 多項式環を定義 | |
R, x = PolynomialRing(QQ, "x") | |
# Hopf代数の構造を実装 | |
struct HopfAlgebra | |
base_ring | |
generator | |
end | |
# 積(Multiplication) | |
function multiply(a::HopfAlgebra, b::HopfAlgebra) | |
return HopfAlgebra(a.base_ring, a.generator * b.generator) | |
end | |
# 単位元(Unit) | |
function unit(HA::HopfAlgebra) | |
return HopfAlgebra(HA.base_ring, one(HA.base_ring)) | |
end | |
# 余積(Comultiplication) | |
function comultiplication(a::HopfAlgebra) | |
return (HopfAlgebra(a.base_ring, a.generator), HopfAlgebra(a.base_ring, a.generator)) | |
end | |
# 余単位元(Counit) | |
function counit(a::HopfAlgebra) | |
return evaluate(a.generator, 1) # x=1 で評価 | |
end | |
# 対合(Antipode) | |
function antipode(a::HopfAlgebra) | |
return HopfAlgebra(a.base_ring, -a.generator) | |
end | |
# 例: Hopf代数の要素を作成 | |
a = HopfAlgebra(R, x) | |
b = HopfAlgebra(R, x^2) | |
# 積を計算 | |
prod_ab = multiply(a, b) | |
println("積 a * b: ", prod_ab.generator) | |
# 余積を計算 | |
coprod_a = comultiplication(a) | |
println("余積 Δ(a): ", coprod_a[1].generator, " ⊗ ", coprod_a[2].generator) | |
# 余単位元を計算 | |
counit_a = counit(a) | |
println("余単位元 ε(a): ", counit_a) | |
# 対合を計算 | |
antipode_a = antipode(a) | |
println("対合 S(a): ", antipode_a.generator) |
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注意:
R, x = PolynomialRing(QQ, "x")
は誤りである.この部分は小文字にしてpolynomial_ring(QQ, "x")
にすると動作する.試してないが,アイデアの基礎は作ることができた.