Basic logic symbols

Symbol Unicode value (hexadecimal) Logic Name
⇒ → ⊃ U+21D2 U+2192 U+2283 material implication
⇔ ≡ ↔ U+21D4 U+2261 U+2194 material equivalence
¬ ˜ ! U+00AC U+02DC U+0021 negation
U+1D53B Domain of discourse

What does ⊃ mean?

Horseshoe (⊃, \supset in TeX) is a symbol used to represent: Material conditional in propositional logic.

What does this symbol ↔ represent?

Logic math symbols table

Symbol Symbol Name Meaning / definition
equivalent if and only if (iff)
for all
there exists
there does not exists

What are the five basic logical connectives?

The Five (5) Common Logical Connectives or Operators

  • Logical Negation.
  • Logical Conjunction (AND)
  • Logical Disjunction (Inclusive OR)
  • Logical Implication (Conditional)
  • Logical Biconditional (Double Implication)

What does |= mean in logic?

They described it as : In logics, meaning is often described by a satisfaction relation. M |= A. that describes when a situation M satisfies a formula A. So, I also searched some examples.

What does +- mean in math?

plus/minus sign

Definition of plus/minus sign

: the sign ± used to indicate a quantity (such as 2 in “the square root of 4 is ±2”) taking on both an algebraically positive value and its negative and to indicate a plus or minus quantity (such as 4 in “the population age was 30 ± 4 years”) — called also plus/minus symbol.

What is this symbol called?

This table contains special characters.

Symbol Name of the symbol Similar glyphs or concepts
‘ ‘ Apostrophe Quotation mark, Guillemet, Prime, Grave
* Asterisk Asterism, Dagger
Asterism Dinkus, Therefore sign
@ At sign

What is symbol in symbolic logic?

The logical OR symbol is used in Boolean algebra to indicate an inclusive disjunction between two statements. An inclusive disjunction is true if either, or both, of its components are true. The most commonly used symbol is a plus sign (+).

What is symbolic logic examples?

Symbolic logic example: Propositions: If all mammals feed their babies milk from the mother (A). If all cats feed their babies mother’s milk (B). All cats are mammals(C).

What does arrow mean in logic?

In mathematical logic the implication arrows \Rightarrow and \Leftrightarrow are used to connect expressions as follows: p\Rightarrow q means ‘IF p is true THEN q is true. p\Leftrightarrow q means both p\Rightarrow q AND q \Rightarrow p simultaneously.

What does ∨ mean in logic?

inclusive disjunction

The symbol ” ∨ ” signifies inclusive disjunction: a ∨ statement is true whenever either (or both) of its component statements is true; it is false only when both of them are false. (See the truth-table at right.)

What does φ mean in philosophy?

In philosophy, φ is often used as shorthand for a generic act. (Also in uppercase.) In perceptual psychology, the phi phenomenon is the apparent motion caused by the successive viewing of stationary objects, such as the frames of a motion picture.

How do you type symbols in logic?

What you'll do is click on the insert button at the top. Then click symbol. Click more symbols and then what you'll do is go up to where it says font. And you'll type in symbol.

What does ⋅ mean?

× multiplication sign

The ⋅ is the same as the × multiplication sign, but it is often used in mathematical notations to prevent possible confusion with the letter ‘x’. e.g. y × x is often written as y ⋅ x. ÷ Division, divide. This is used to indicate that one number is divided by another, e.g. 3 ÷ 2 = 1.5.

What does ∧ mean in math?


∧ or (English symbol name wedge) (mathematics, logic) The conjunction operator, forming a Boolean-valued function, typically with two arguments, returning true only if all of its arguments are true.

What symbol is used for the operation and?

Basics of Operators

Symbol Operation Usage
&& logical AND x && y
|| logical OR x || y
! logical NOT ! x

What does V mean in logic?


In symbolic logic, a sign such as V connects two statements to form a third statement. For example, V replaces the word “or” and Λ replaces the word “and.” The following is a list of the symbols commonly encountered: p, q, r,…

What is the symbol for multiplying?


Use the multiplication sign (×), not the letter x, to indicate the mathematical operation.