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Bug in power of large numbers #491

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dpsanders opened this issue Sep 17, 2021 · 4 comments · Fixed by #567
Closed

Bug in power of large numbers #491

dpsanders opened this issue Sep 17, 2021 · 4 comments · Fixed by #567

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@dpsanders
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julia> x = -Inf..(-1e308)
[-∞, -9.99999e+307]

julia> x^3
∅

This should not be empty.
@dpsanders
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This only seems to happen on the dps/config branch?

@dpsanders
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dpsanders commented Sep 17, 2021 •
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This seems to be a bug in IntervalArithmetic.power_by_squaring:

julia> y = -1e308
-1.0e308

julia> IntervalArithmetic.power_by_squaring(y, 3, RoundUp)
-Inf

@lucaferranti
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on master

julia> x = -Inf..(-1e308)
[-∞, -9.99999e+307]

julia> x^3
[-∞, -1.79769e+308]

@dpsanders
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We should add a test for this in any case.

@lucaferranti lucaferranti mentioned this issue Jun 1, 2022
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@OlivierHnt OlivierHnt mentioned this issue Jun 13, 2023
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@OlivierHnt OlivierHnt mentioned this issue Jul 24, 2023
Merged
@Kolaru Kolaru closed this as completed Jul 24, 2023
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Merge 1.0-dev into master JuliaIntervals/IntervalArithmetic.jl
3 participants
@dpsanders @Kolaru @lucaferranti