Euler Class

The Euler class is the image of under the composition of these maps.

Read more about Euler Class:  Properties, Relations To Other Invariants

Famous quotes containing the word class:

    “Each class of society has its own requirements; but it may be said that every class teaches the one immediately below it; and if the highest class be ignorant, uneducated, loving display, luxuriousness, and idle, the same spirit will prevail in humbler life.”
    —First published in Girls’ Home Companion (1895)