CW vs パルス

CW - complexes Stephen

The term CW-complex comes from “closure-finite with the weak topology”, where “closure-finite” refers to A3 and “weak topology” refers to A4. A finite complex is a CW-complex with only finitely many cells. Observe that if X is a finite complex, A4 is redundant, since W is the union of the compact sets φα((φ n α) −1W ), and these are closed since X is Hausdorff. If X has cells of dimension n but...

Products of Cw-complexes

We show that Liu's characterization for the product K x L to be a CW-complex is independent of the usual axioms of set theory.

Toward visible cw-pumped supercontinua.

We report a 1 mum cw-pumped supercontinuum that extends short of the pump wavelength to 0.65 mum. This is achieved by using a 50 W Yb fiber laser in combination with a photonic crystal fiber with a carefully engineered zero-dispersion wavelength. We show that the short-wavelength generation is due to a combination of four-wave mixing and dispersive wave trapping by solitons. The evolution and l...

High Pressure Cw Chemical Laser

Chapter 5 CW DYE LASERS