Source: wikibot/cremona-group
= Cremona group
{wiki=Cremona_group}
The Cremona group is a fundamental concept in algebraic geometry, specifically regarding the study of rational transformations in projective space. In particular, the Cremona group \\( \\text\{Cr\}(n) \\) refers to the group of birational transformations of \\( \\mathbb\{P\}^n \\), the \\( n \\)-dimensional projective space over a field (often taken to be the complex numbers or other algebraically closed fields).