Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

document strong zero property of false #34703

Merged
merged 1 commit into from
Apr 29, 2020
Merged

document strong zero property of false #34703

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 12 additions & 0 deletions doc/src/manual/mathematical-operations.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,18 @@ julia> 3*2/12
operators. For instance, we would generally write `-x + 2` to reflect that first `x` gets negated,
and then `2` is added to that result.)

When used in multiplication, `false` acts as a *strong zero*:

```jldoctest
julia> NaN * false
0.0

julia> false * Inf
0.0
```

This is useful for preventing the propagation of `NaN` values in quantities that are known to be zero. See [Knuth (1992)](https://arxiv.org/abs/math/9205211) for motivation.

## Bitwise Operators

The following [bitwise operators](https://en.wikipedia.org/wiki/Bitwise_operation#Bitwise_operators)
Expand Down