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Hello there.

This is Numberphile. We mainly post videos about mathematics and just numbers in general.

Practical Numbers

Practical Numbers

Brady Haran
James Grime, Number Systems, Sequences

Featuring Dr James Grime.

Patreon: http://www.patreon.com/numberphile

Practical Numbers (AKA panarithmic numbers) on the OEIS: https://oeis.org/A005153

James Grime: https://www.singingbanana.com

His YouTube channel: https://www.youtube.com/user/singingbanana

More James on Numberphile: http://bit.ly/grimevideos

Parabolic Mirrors

Parabolic Mirrors
Book Embedding of Graphs

Book Embedding of Graphs