polydisc
Sign in to saveIn the theory of functions of several complex variables, a branch of mathematics, a polydisc is a Cartesian product of discs.
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In the theory of functions of several complex variables, a branch of mathematics, a polydisc is a Cartesian product of discs.
More specifically, if we denote by D(z,r) the open disc of center z and radius r in the complex plane, then an open polydisc is a set of the form D(z_1,r_1) \times \dots \times D(z_n,r_n).
Excerpted from Wikipedia’s “polydisc” article, available under the CC BY-SA 4.0 licence.