What it means
f ∗ g blends two functions by sliding one across the other and integrating their product. It describes blurring, filtering and the distribution of a sum of independent random variables.
Read aloud in real formulas
y = x ∗ h
Aethel says
y equals x convolved with h
the output of a filter with impulse response h
Typing it
- LaTeX
- f * g
- Unicode
- U+2217
Formulas that use it
Questions
How do you say ∗ out loud?
It is usually read “convolved with”, and also “star”.
What does ∗ mean in maths?
f ∗ g blends two functions by sliding one across the other and integrating their product. It describes blurring, filtering and the distribution of a sum of independent random variables.
How do you type ∗?
In LaTeX, write f * g. Its Unicode code point is U+2217.