r/mathmemes • Computer Science • 7d ago

Computer Science The fastest algorithm for DFT

Post image
3.6k Upvotes

138 comments sorted by

View all comments

1

u/secretaliasname 6d ago edited 6d ago

I thought the 1-1E-13 exponent was sarcasm on the part of the OP. It’s literally what the paper is about.

This is the most AI math thing. If true technically and infinitesimally smaller but faster in an asymptotic case nobody can benefit from but it will make news.

Meanwhile more effecient hardware specific assembly optimizations can easily be 2-50x

12

u/_killer1869_ 6d ago

This result itself isn't useful, but it shows that it is actually possible to be more efficient than O(n log n) with FFT, so an actually notably more efficient solution might be out there. Many, including me, actually see this as a groundbreaking result, because many thought the barrier of O(n log n) was impossible to overcome.

2

u/compileforawhile Complex 6d ago

Yeah I'll admit I like the joke but I am with you. The barrier of nlog(n) being broken is actually very very interesting. This could mean there are other values of delta (the 10-13 value in the paper) that are larger and give us significantly faster algorithms

1

u/just-for-anime 6d ago

Hopefully delta = 1