Swan if a mate dies, the remaining swan will take up with another. The number of eggs in each clutch ranges from three to eight. The English word 'swan', akin to the German "Schwan", Dutch "zwaan" and Swedish "svan", is derived from Indo-European root "*swen" (to sound, to sing). Young swans are known as "swanlings" or as "cygnets"; the latter derives via Old French "cigne" or "cisne" (diminutive suffix -"et" "little") from the Latin word "", a variant form of "cycnus" "swan", itself from the Greek "kýknos", a word of the same meaning. An adult male is a "cob", from Middle
Richard Swan of Chicago. His doctoral students at Chicago include Charles Weibel, also known for his work in K-theory. Richard Swan Richard Gordon Swan (; born 1933) is an American mathematician who is known for the Serre–Swan theorem relating the geometric notion of vector bundles to the algebraic concept of projective modules, and for the Swan representation, an "l"-adic projective representation of a Galois group. His work has mainly been in the area of algebraic K-theory. Swan earned his Ph.D. in 1957 from Princeton University under the supervision of John Coleman Moore. In 1969 he proved in full generality what is now