Rose (topology)
（重定向自Bouquet of circles）
![A rose with four petals.](/Images/godic/202501/01/Topological_Rose1716.png")
![The universal cover of the figure eight can be visualized by the Cayley graph of the free group on two generators a and b](/Images/godic/202501/01/Cayley_graph_of_F2.svg1716.png")
![A figure eight in the torus.](/Images/godic/202501/01/Torus_cycles1717.png")
In mathematics, a rose (also known as a bouquet of n circles) is a topological space obtained by gluing together a collection of circles along a single point. The circles of the rose are called petals. Roses are important in algebraic topology, where they are closely related to free groups.