**Trace Diagram**

In mathematics, **trace diagrams** are a graphical means of performing computations in linear and multilinear algebra. They can be represented as (slightly modified) graphs in which some edges are labeled by matrices. The simplest trace diagrams represent the trace and determinant of a matrix. Several results in linear algebra, such as Cramer's Rule and the Cayleyâ€“Hamilton theorem, have simple diagrammatic proofs. They are closely related to Penrose's graphical notation.

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### Famous quotes containing the words diagram and/or trace:

““God’s fire upon the wane,

A *diagram* hung there instead,

More women born than men.””

—William Butler Yeats (1865–1939)

“A horse, a buggy and several sets of harness, valued in all at about $250, were stolen last night from the stable of Howard Quinlan, near Kingsville. The county police are at work on the case, but so far no *trace* of either thieves or booty has been found.”

—H.L. (Henry Lewis)