Sentence examples for be a double covering from inspiring English sources

Let be a double covering.

Now, let be a double covering, and let be the composition.

In order to show that, note that since each restriction is a homeomorphism and is a double covering, for each map homotopic to, the equation must have at least two roots in each,.

In order to prove that, note that since each restriction is a homeomorphism and is a double covering, for each map homotopic to, the equation must have at least two roots in each,.

Let be an arbitrary double covering.

Let be an -fold covering (e.g., as in the first item), and let be the orientable double covering.

Let be the composition, where is the canonical double covering.

Let be the orientable double covering.

Let be the canonical double covering.

For the purpose of letting G act on (fancyscript {A}_V), let this representation be lifted to that of a double covering (widetilde{G}) of G by begin{aligned} iota : ; widetilde{G} hookrightarrow widetilde{H} = mathrm {Spin} (W_1) times _{mathbb {Z}_2} widetilde{mathrm {H}} (W_0^s).

This shows that there are maps from 2-dimensional CW complexes into closed surfaces having liftings through a double covering and satisfying the strict inequality (3.3).