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GradedLieAlgebras :: ExtElement + ExtElement

ExtElement + ExtElement -- addition of Ext-algebra elements

Synopsis

Description

The symbol + is used as infix notation for the Ext-algebra addition. The elements $x$ and $y$ must have the same weight and sign.

i1 : L = lieAlgebra{a,b,c}/{a b,b c}

o1 = L

o1 : LieAlgebra
i2 : E = extAlgebra(3,L)

o2 = E

o2 : ExtAlgebra
i3 : basis(2,E)

o3 = {ext_3, ext_4}

o3 : List
i4 : ext_4+2 ext_3

o4 = 2ext_3 + ext_4

o4 : E

See also