IN this tract Miss Telling has presented in compact form a great deal of information, gathered from various sources, which is not available as a whole elsewhere. The tract is divided into two chapters ...

Temporal optical solitons have been the subject of intense research due to their intriguing physics and applications in ultrafast optics and supercontinuum generation. Conventional bright optical ...

I read in Jim Martin’s recent piece a comment about the quadratic formula. It got me thinking. Most of us were taught the quadratic formula in school. It’s a funny-looking, messy, mathematical ...

A very general surface of degree at least four in P3 contains no curves other than intersections with surfaces. We find a formula for the degree of the locus of surfaces in P3 of degree at least five ...