Yarn is skeined using a niddy noddy or other type of skein -winder. Putting the wool back on the niddy-noddy makes for a nicer looking finished skein. The skein is too tangled to be unravelled. With a Tangled Skein is a fantasy novel by Piers Anthony. A single 50-fathom skein () of this rope was referred to as a "line". The following is an example of a typical computation using a skein relation. Bellare is one of the authors of skein. The second rule is what is often referred to as a skein relation. The skein tracks player commands as a tree of branching possibilities. Then, beginning in , they began a skein of eight straight below-.500 and second-division campaigns. See the page on skein relation for an example of a computation using such relations. Alexander proved the Alexander polynomial satisfies a skein relation. See the article on skein relation for an example of a computation using these relations. Canada geese, ducks and swans commonly form a skein in V formation. It also affects the Skein hash function.