∅ \O| empty set, ∩ \ni intersection, ∪ \uu union, ⊂ \c= subset of, ∈ \e= element of ∞ \oo infinity, ⊥ \Tt up tack ( perpendicular to) ∝ \oc proportional to, ≡ \=3 defined as (or congruent modulo), ≈ \~~ approximately equal to ∀ \At for all, ∃ \Er there exists, ∴ \.3 therefore ¬ \no logical not, ∧ \an logical and, ∨ \or logical or ≤ \_ greater than or equal to, ≠ \=/ not equal to ° \dg degree, ′ \'p prime ( minute), ″ \"p double prime ( second) \.c middle dot, × \xx multiplication, ÷ \:- division, ∕ \/d division slash.In this way, you can get a hundred non-ASCII symbols that are used in the alphabets of many European languages. To get the symbol “â” (a-circumflex), you type “\a^”, i.e., a sequence of backslash a circumflex. You can usually also type the characters themselves, if your computer has an input method for them. ![]() ![]() ![]() When drawing text into the Picture window or into the TextGridEditor, you can use backslash sequences to display various kinds of special symbols.
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