kalmar/Groups.jl
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fix: dealias inv(id) from id

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kalmarek 2020-04-20 03:25:25 +02:00
parent a5fd4421d5
commit 512394e69b
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4 changed files with 12 additions and 4 deletions
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2
src/AutGroup.jl
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@ -91,7 +91,7 @@ function change_pow(s::AutSymbol, n::Integer)
elseif symbol isa LTransvect elseif symbol isa LTransvect
return transvection_L(symbol.i, symbol.j, n) return transvection_L(symbol.i, symbol.j, n)
elseif symbol isa Identity elseif symbol isa Identity
return s return id_autsymbol()
else else
throw(DomainError("Unknown type of AutSymbol: $s")) throw(DomainError("Unknown type of AutSymbol: $s"))
end end

2
src/arithmetic.jl
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@ -1,5 +1,5 @@
function Base.inv(W::T) where T<:GWord function Base.inv(W::T) where T<:GWord
length(W) == 0 && return W length(W) == 0 && return one(W)
G = parent(W) G = parent(W)
w = T([inv(s) for s in Iterators.reverse(syllables(W))]) w = T([inv(s) for s in Iterators.reverse(syllables(W))])
return setparent!(w, G) return setparent!(w, G)

3
test/AutGroup-tests.jl
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@ -16,7 +16,8 @@
@test Groups.id_autsymbol() isa Groups.AutSymbol @test Groups.id_autsymbol() isa Groups.AutSymbol
@test inv(Groups.id_autsymbol()) isa Groups.AutSymbol @test inv(Groups.id_autsymbol()) isa Groups.AutSymbol
@test inv(Groups.id_autsymbol()) == Groups.id_autsymbol() x = Groups.id_autsymbol()
@test inv(x) == Groups.id_autsymbol()
end end
a,b,c,d = gens(FreeGroup(4)) a,b,c,d = gens(FreeGroup(4))

7
test/FreeGroup-tests.jl
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@ -109,6 +109,13 @@ end
tt = deepcopy(t) tt = deepcopy(t)
append!(tt, s, inv(t)) append!(tt, s, inv(t))
@test string(tt) == "t*s*t^-1" @test string(tt) == "t*s*t^-1"
o = one(t)
o_inv = inv(o)
@test o == o_inv
@test o !== o_inv
Groups.rmul!(o, t)
@test o != o_inv
end end
@testset "reductions" begin @testset "reductions" begin