The Schwinn Bicycle Company was founded by German-born mechanical engineer Ignaz Schwinn (1860-1945) in Chicago in 1895, became the dominant manufacturer of American bicycles through most of the 20th century and is now an out-sourced sub-brand of Pacific Cycle, currently owned by the multi-
Since 1895, America's bicycle brand
A vehicle composed of two wheels held in a frame one behind the other, propelled by pedals and steered with handlebars attached to the front wheel
ride a bicycle
a wheeled vehicle that has two wheels and is moved by foot pedals
In graph theory, a pseudoforest is an undirected graphThe kind of undirected graph considered here is often called a multigraph or pseudograph, to distinguish it from a simple graph. in which every connected component has at most one cycle.