kalmar/Groups.jl
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fix error in wlmetric_ball_serial

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kalmarek 2020-10-09 17:37:57 +02:00
parent 6e856dd7c2
commit 59272b3b42
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2 changed files with 3 additions and 5 deletions
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6
src/Groups.jl
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@ -72,7 +72,6 @@ word-length metric on the group generated by `S`. The ball is centered at `cente
(by default: the identity element). `radius` and `op` keywords specify the
radius and multiplication operation to be used.
"""
function wlmetric_ball_serial(
S::AbstractVector{T};
radius = 2,
@ -81,10 +80,7 @@ function wlmetric_ball_serial(
old = unique!([one(first(S)), S...])
sizes = [1, length(old)]
for i = 2:radius
new = collect(
op(i, j)
for (i, j) in Base.product(@view(old[sizes[end-1]:end]), S)
)
new = collect(op(o, s) for o in @view(old[sizes[end-1]:end]) for s in S)
append!(old, new)
resize!(new, 0)
old = unique!(old)

2
test/runtests.jl
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@ -15,6 +15,8 @@ using LinearAlgebra
S = [w,r,s]; S = unique([S; inv.(S)]);
_, sizes = Groups.wlmetric_ball(S, radius=4);
@test sizes == [7, 33, 141, 561]
_, sizes = Groups.wlmetric_ball_serial(S, radius=4);
@test sizes == [7, 33, 141, 561]
end
include("FreeGroup-tests.jl")