The upper-case letter Π is used as a symbol for:
The lower-case letter π is used as a symbol for:
See also Pi (movie)
... Board of Regents[?] 339 US 637 1950, NAACP v. Alabama 357 US 449 1958, Boynton v. Virginia[?] 364 US 454 1960 and probably the most famous, Brown v. Board of Education of ...
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