■パラメータ解? (その81)

 ラマヌジャン解(2パラメータ)についても調べてみたい.

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a=3m^2+5mn−5n^2 ,

b=4m^2−4mn+6n^2 ,

c=5m^2−5mn−3n^2 ,

d=6m^2−4mn+4n^2

a=3m^2−5n^2+5mn ,

b=4m^2+6n^2−4mn ,

c=5m^2−3n^2−5mn,

d=6m^2+4n^2−4mn

a^3=(3m^2−5n^2)^3+15mn(3m^2−5n^2)^2+75m^2n^2(3m^2−5n^2)+125m^3n^3

b^3=(4m^2+6n^2)^3−12mn(4m^2+6n^2)^2+48m^2n^2(4m^2+6n^2)−64m^3n^3

c^3=(5m^2−3n^2)^3−15mn(5m^2−3n^2)^2+75m^2n^2(5m^2−3n^2)−125m^3n^3

d^3=(6m^2+4n^2)^3−12mn(6m^2+4n^2)^2+48m^2n^2(6m^2+4n^2)−64m^3n^3

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