Aren't complex exponentials signal rotations? If you multiply a sinusoidal signa... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		pgt on Nov 5, 2019 \| parent \| context \| favorite \| on: What does the Laplace Transform tell us? A visual ... Aren't complex exponentials signal rotations? If you multiply a sinusoidal signal by e^(-iwt), you are essentially shifting its phase modulus, no?

danharaj on Nov 5, 2019 [–]

Those are purely imaginary exponentials. General complex exponentials also have a real part.

dreamcompiler on Nov 5, 2019 | [–]

And that's how the FT differs from the LT. LT is complex while FT is purely imaginary, as the video explains.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact