Pin Group - Name

Name

The name was introduced in (Atiyah, Bott & Shapiro 1964, page 3, line 17), where they state "This joke is due to J-P. Serre". It is a back-formation from Spin: "Pin is to O(n) as Spin is to SO(n)", hence dropping the "S" from "Spin" yields "Pin".

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Famous quotes containing the word name:

    “Name any name and then remember everybody you ever knew who bore than name. Are they all alike. I think so.”
    —Gertrude Stein (1874–1946)

    “What is it? a learned man
    Could give it a clumsy name.
    Let him name it who can,
    The beauty would be the same.”
    —Alfred Tennyson (1809–1892)