Riemann surface

American  

noun

Mathematics.

1. a geometric representation of a function of a complex variable in which a multiple-valued function is depicted as a single-valued function on several planes, the planes being connected at some of the points at which the function takes on more than one value.

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Etymology

Origin of Riemann surface

First recorded in 1890–95; named after G. F. B. Riemann

Example Sentences

According to the TV broadcast, Buehler had both the index and middle fingers bandaged during his bullpen session Saturday — not just the index finger where his blister problem initially surfaced.

From Los Angeles Times • Oct. 12, 2020

Homeland Security Secretary Jeh Johnson, who had apologized to Chaffetz when the report initially surfaced, personally apologized again to the congressman Wednesday, Chaffetz told The Associated Press in an interview on Capitol Hill.

From US News • Oct. 1, 2015

Reports initially surfaced in May of the video's existence, but it has never been released publicly.

From BBC • Nov. 4, 2013

Rumors of the decision to go west for the first time since the 1998 PGA at Sahalee initially surfaced this week in online message boards.

From Golf Digest • Oct. 16, 2013

Reports had initially surfaced that Dorner’s body had been found inside the cabin and identified, but they turned out to be unconfirmed.

From Time • Feb. 13, 2013