Unicode: Tacks, Turnstiles ⊣ ⊢ ⊥ ⊤ ⫪ ⫫

By Xah Lee. Date: . Last updated: .

Tacks

tacks (used in logic.)
, ,

long tacks

tack with circle

double tack

short tack
,

˔ ˕

turnstile

, ,

Tack Meaning

  • → empty type (type theory)
  • → unit type (type theory)
  • → assumption to judgement (type theory)
  • → ASSERTION
  • B → Boolean (type theory)

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