Characteristic number

The same as an eigen value or characteristic value of a matrix (see Characteristic polynomial).

The value of a characteristic class of the tangent bundle (or another interesting bundle) of a (closed) manifold on a fundamental cycle of this manifold.

References

[a1]	J.W. Milnor, J.D. Stasheff, "Characteristic classes", Princeton Univ. Press (1974) MR0440554 Template:ZBL