In mathematics, **genus** (plural **genera**) has a few different, but closely related, meanings. Intuitively, the genus is the number of "holes" of a surface.[1] A sphere has genus 0, while a torus has genus 1.

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In mathematics, **genus** (plural **genera**) has a few different, but closely related, meanings. Intuitively, the genus is the number of "holes" of a surface.[1] A sphere has genus 0, while a torus has genus 1.

Oops something went wrong: