kalmar/Groups.jl
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allow numbers > 9 in subscriptify

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kalmarek 2020-10-07 02:33:58 +02:00
parent 2674652221
commit 873361af73
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1 changed files with 15 additions and 10 deletions
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25
src/AutGroup.jl
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@ -35,9 +35,7 @@ end
# https://github.com/JuliaIntervals/ValidatedNumerics.jl/blob/master/LICENSE.md
function subscriptify(n::Integer)
subscript_0 = Int(0x2080) # Char(0x2080) -> subscript 0
@assert 0 <= n <= 9
return Char(subscript_0 + n)
# return [Char(subscript_0 + i) for i in reverse(digits(n))])
return join([Char(subscript_0 + i) for i in reverse(digits(n))], "")
end
function id_autsymbol()
@ -45,18 +43,26 @@ function id_autsymbol()
end
function transvection_R(i::Integer, j::Integer, pow::Integer=1)
id = Symbol("ϱ", subscriptify(i), subscriptify(j))
if 0 < i < 10 && 0 < j < 10
id = Symbol(:ϱ, subscriptify(i), subscriptify(j))
else
id = Symbol(:ϱ, subscriptify(i), "." ,subscriptify(j))
end
return AutSymbol(id, pow, RTransvect(i, j))
end
function transvection_L(i::Integer, j::Integer, pow::Integer=1)
id = Symbol("λ", subscriptify(i), subscriptify(j))
if 0 < i < 10 && 0 < j < 10
id = Symbol(:λ, subscriptify(i), subscriptify(j))
else
id = Symbol(:λ, subscriptify(i), "." ,subscriptify(j))
end
return AutSymbol(id, pow, LTransvect(i, j))
end
function flip(i::Integer, pow::Integer=1)
iseven(pow) && return id_autsymbol()
id = Symbol("ɛ", subscriptify(i))
id = Symbol(:ɛ, subscriptify(i))
return AutSymbol(id, 1, FlipAut(i))
end
@ -66,7 +72,7 @@ function AutSymbol(p::Generic.Perm, pow::Integer=1)
end
if any(p.d[i] != i for i in eachindex(p.d))
id = Symbol("σ", "₍", [subscriptify(i) for i in p.d]..., "₎")
id = Symbol(:σ, "₍", join([subscriptify(i) for i in p.d],""), "₎")
return AutSymbol(id, 1, PermAut(p))
end
return id_autsymbol()
@ -78,9 +84,8 @@ end
σ(v::Generic.Perm, pow::Integer=1) = AutSymbol(v, pow)
function change_pow(s::AutSymbol, n::Integer)
if n == zero(n)
return id_autsymbol()
end
iszero(n) && id_autsymbol()
symbol = s.fn
if symbol isa FlipAut
return flip(symbol.i, n)