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Increase accuracy for estimate opnorm #29

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Increase accuracy for estimate opnorm #29

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4 changes: 2 additions & 2 deletions src/properties.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -414,15 +414,15 @@ These parameters can be adjusted by passing `maxit` and `tol` keyword arguments.
julia> estimate_opnorm(A; maxit=50, tol=1e-6)
```
"""
function estimate_opnorm(A::AbstractOperator; maxit=20, tol=1e-4)
function estimate_opnorm(A::AbstractOperator; maxit=50, tol=eps(real(codomain_type(A)))*100)
if has_fast_opnorm(A)
return opnorm(A)
else
return powerit(A; maxit, tol)
end
end

function powerit(A::AbstractOperator; maxit=100, tol=1e-8)
function powerit(A::AbstractOperator; maxit=200, tol=eps(real(codomain_type(A)))*100)
# Power method for estimating the operator norm
AHA = A' * A
x = allocate_in_domain(A)
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