kalmar/Groups.jl
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streamline and adapt simplify_perms!

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kalmar 2017-05-15 17:21:48 +02:00
parent c20259e1b7
commit 18ae84d9cd
1 changed files with 9 additions and 7 deletions
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16
src/AutGroup.jl
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@ -249,24 +249,26 @@ inv(f::AutSymbol) = change_pow(f, -f.pow)
#
###############################################################################
ispermauto(s::AutSymbol) = s.ex.args[1] == :σ
function simplify_perms!(W::AutGroupElem)
reduced = true
for i in 1:length(W.symbols) - 1
current = W.symbols[i]
if current.ex.args[1] == :σ
if ispermauto(current)
if current.pow != 1
current = symmetric_AutSymbol(perm(current), pow=current.pow)
current = perm_autsymbol(perm(current), pow=current.pow)
end
next_s = W.symbols[i+1]
if next_s.ex.args[1] == :σ
if ispermauto(next_s)
reduced = false
if next_s.pow != 1
next_s = symmetric_AutSymbol(perm(next_s), pow=next_s.pow)
next_s = perm_autsymbol(perm(next_s), pow=next_s.pow)
end
p1 = Permutation(getperm(current))
p2 = Permutation(getperm(next_s))
p1 = getperm(current)
p2 = getperm(next_s)
W.symbols[i] = id_autsymbol()
W.symbols[i+1] = symmetric_AutSymbol(array(p1*p2))
W.symbols[i+1] = perm_autsymbol(p1*p2)
end
end
end