The small Veblen ordinal or or is the limit of ordinals that can be described using a version of Veblen functions with finitely many arguments. It is the ordinal that measures the strength of Kruskal's theorem. It is also the ordinal type of a certain ordering of rooted trees (Jervell 2005).
Famous quotes containing the word small:
“‘Or like small gnats and flies, as thick as mist
On evening marches, thronged about the brow
Of lawyers, statesmen, priest and theorist;—”
—Percy Bysshe Shelley (1792–1822)