Stokes' Theorem is a classic result from vector calculus.
It tells us that the line integral of a vector field over a loop is equal to the surface integral of the curl of the vector field over some enclosed surface.
Over 24 hours: A Muslim killed 3 Americans in Syria. 5 Muslims arrested for plotting a massacre at a Christmas market in Germany. Paris concert cancelled due to Muslim violence. 2 Muslims murdered 12 people at a Hanukkah party in Australia. Islamophobia is getting out of control!
🇫🇷 Meanwhile in Paris
Two Russian women visit the French capital, enjoy a spot of lunch, and are hysterical with laughter over what the once classy city of romance and culture has become.