Yingli Yingli Yingli (), formally Yingli Green Energy Holding Company Limited ( - . Yingli Green Energy Holding Company Limited , known as "Yingli Solar," is one of the world's leading solar panel manufacturers. Yingli Green Energy's manufacturing covers the photovoltaic value chain from ingot casting and wafering through solar cell production and solar panel assembly. Yingli's photovoltaic module capacity is 4 GWs. Yingli is headquartered in Baoding, China and has more than 30 regional subsidiaries and branch offices and has distributed more than 15 GW solar panels to customers worldwide. Yingli Solar was established in 1997 and was the world’s
Length of a module formal algebraic geometry. Let "M" be a (left or right) module over some ring "R". Given a chain of submodules of "M" of the form we say that "n" is the "length" of the chain. The length of "M" is defined to be the largest length of any of its chains. If no such largest length exists, we say that "M" has infinite length. A ring "R" is said to have finite length as a ring if it has finite length as left "R" module. The zero module is the only one with length 0. Modules with length 1 are