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 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 does this symbol mean →?

⇒ (the implies sign) means “logically implies that”. (E.g., “if it’s raining, then it’s pouring” is equivalent to saying “it’s raining ⇒ it’s pouring.”)

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 ⊃ mean?

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

What does → mean in math?


The ⇒ symbol is often used in text to mean “result” or “conclusion”, as in “We examined whether to sell the product ⇒ We will not sell it”. Also, the → symbol is often used to denote “changed to”, as in the sentence “The interest rate changed.

What is this symbol called?

This table contains special characters.

Symbol Name of the symbol Similar glyphs or concepts
Almost equal to Approximately equal to sign.
& Ampersand plus sign
⟨ ⟩ Angle brackets Bracket, Parenthesis, Greater-than sign, Less-than sign
‘ ‘ Apostrophe Quotation mark, Guillemet, Prime, Grave

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 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.

Is there a symbol for or?

“And/or” is just called “or” and is represented as ∨ , from the Latin vel meaning or. But note that it’s a separate symbol from the letter “v”, though similar. In contrast, “or” in the sense of “this one or that one but never both” is called “exclusive or” or “xor” and can be symbolized as ⊻ or ⊕ .

How do you read a symbol?

We usually here press the star. Key dollar sign % or percent symbol caret ampersand or and underscore – when it's written in text. – sign would it's written in a numeric equation.

Who invented plus and minus?

Robert Recorde, the designer of the equals sign, introduced plus and minus to Britain in 1557 in The Whetstone of Witte: “There be other 2 signes in often use of which the first is made thus + and betokeneth more: the other is thus made – and betokeneth lesse.”

How can you use completing the square to solve a quadratic equation?

You can solve quadratic equations by completing the square. Completing the square involves creating a perfect square trinomial from the quadratic equation, and then solving that trinomial by taking its square root. Put the x-squared and the x terms on one side and the constant on the other side.

How do you find the axis of symmetry?

The symmetry cuts any geometric shape into two equal halves. The axis of symmetry formula is given as, for a quadratic equation with standard form as y = ax2 + bx + c, is: x = -b/2a. If the parabola is in vertex form y = a(x-h)2 + k, then the formula is x = h.

How do you convert standard form to vertex form?

The standard form of a parabola is y=ax2+bx+c y = a x 2 + b x + c . The vertex form of a parabola is y=a(x−h)2+k y = a ( x − h ) 2 + k .

Lesson Plan.

1. How to Convert Standard Form To Vertex Form?
2. Important Notes on Standard Form to Vertex Form
3. Tips and Tricks on Standard Form to Vertex Form

How do you find the vertex of a parabola equation?

Finding Vertex of a Parabola From Standard Form

  1. Step – 1: Compare the equation of the parabola with the standard form y = ax2 + bx + c. …
  2. Step – 2: Find the x-coordinate of the vertex using the formula, h = -b/2a. …
  3. Step – 3: To find the y-coordinate (k) of the vertex, substitute x = h in the expression ax2+ bx + c.

How do you graph quadratic equations?

Graph a quadratic equation in two variables.

  1. Write the quadratic equation with. on one side.
  2. Determine whether the parabola opens upward or downward.
  3. Find the axis of symmetry.
  4. Find the vertex.
  5. Find the y-intercept. …
  6. Find the x-intercepts.
  7. Graph the parabola.

How do you find a quadratic function from a graph?

Equals a times the quantity x minus negative two squared. Plus k which gives us plus four. And x minus negative two simplifies to x plus two.