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Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.
symbol code point name ⍻ u+237b: not check mark ☐ u+2610: ballot box ☑: u+2611: ballot box with check : u+2705: white heavy check mark u+2713: check mark : u+2714: heavy check mark 𐄂 u+10102: aegean check mark 𝤿 u+1d93f: signwriting movement-wallplane check small 𝥀 u+1d940: signwriting movement-wallplane check medium 𝥁 u+1d941
is true only if both A and B are false, or both A and B are true. Whether a symbol means a material biconditional or a logical equivalence , depends on the author’s style. x + 5 = y + 2 ⇔ x + 3 = y {\displaystyle x+5=y+2\Leftrightarrow x+3=y}
The tee (⊤, \top in LaTeX), also called down tack (as opposed to the up tack) or verum, [1] is a symbol used to represent: . The top element in lattice theory.; The truth value of being true in logic, or a sentence (e.g., formula in propositional calculus) which is unconditionally true.
Symbol Name Symbol(s) Meaning Example of Use Dele: Delete: Pilcrow (Unicode U+00B6) ¶ Begin new paragraph: Pilcrow (Unicode U+00B6) ¶ no: Remove paragraph break: Caret [a] (Unicode U+2038, 2041, 2380) ‸ or ⁁ or ⎀ Insert # Insert space: Close up (Unicode U+2050) ⁐ Tie words together, eliminating a space: I was reading the news⁐paper ...
The corresponding logical symbols are "", "", [6] and , [10] and sometimes "iff".These are usually treated as equivalent. However, some texts of mathematical logic (particularly those on first-order logic, rather than propositional logic) make a distinction between these, in which the first, ↔, is used as a symbol in logic formulas, while ⇔ is used in reasoning about those logic formulas ...
The ditto mark is a shorthand sign, used mostly in hand-written text, indicating that the words or figures above it are to be repeated. [1] [2]The mark is made using "a pair of apostrophes"; [1] "a pair of marks " used underneath a word"; [3] the symbol " (quotation mark); [2] [4] or the symbol ” (right double quotation mark).
The tee symbol is sometimes used to denote an arbitrary tautology, with the dual symbol representing an arbitrary contradiction; in any symbolism, a tautology may be substituted for the truth value "true", as symbolized, for instance, by "1". [1]