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BergEC-jl
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Absolute singular values

This commit is contained in:
Nuwan Yapa 2025-01-06 15:42:01 -05:00
parent 4815366e36
commit 9462cd43bf
1 changed files with 3 additions and 3 deletions
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6
helper.jl
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@ -71,12 +71,12 @@ function gram_schmidt(vecs, ws, precision=1e-10, verbose=false)
end
"Rank of a basis set (pre-normalized) under c-product"
c_rank(vecs, ws, threshold=1e-8) = count(abs.(c_singular_values(vecs, ws)) .> threshold)
c_rank(vecs, ws, threshold=1e-8) = count(c_singular_values(vecs, ws) .> threshold)
"Singular values of a basis set (pre-normalized) under c-product"
"Singular values (magnitudes) of a basis set (pre-normalized) under c-product"
function c_singular_values(vecs, ws)
basis = hcat(vecs...)
N = transpose(basis) * spdiagm(ws) * basis
singular_values = eigvals(N) .|> complex .|> sqrt
singular_values = eigvals(N) .|> abs .|> sqrt
return singular_values
end