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  2. CafePress - Wikipedia

    en.wikipedia.org/wiki/CafePress

    CafePress, Inc. was founded as a privately owned company in 1999 by Fred Durham and Maheesh Jain. [2] [3]In July 2008, CafePress acquired the specialist photographic art printing business Imagekind, [4] and in September 2010 further acquired photo-to-canvas company Canvas On Demand to add to their platform of brands.

  3. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    2. Commonly used for denoting any strict order. 3. Between two groups, may mean that the second one is a proper subgroup of the first one. ≤ 1. Means "less than or equal to". That is, whatever A and B are, A ≤ B is equivalent to A < B or A = B. 2. Between two groups, may mean that the first one is a subgroup of the second one. ≥ 1.

  4. List of logic symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_logic_symbols

    propositional logic, Boolean algebra, first-order logic. ⊥ {\displaystyle \bot } denotes a proposition that is always false. The symbol ⊥ may also refer to perpendicular lines. The proposition. ⊥ ∧ P {\displaystyle \bot \wedge P} is always false since at least one of the two is unconditionally false. ∀.

  5. Closed-form expression - Wikipedia

    en.wikipedia.org/wiki/Closed-form_expression

    Closed-form expression. In mathematics, an expression or equation is in closed form if it is formed with constants, variables and a finite set of basic functions connected by arithmetic operations ( +, −, ×, /, and integer powers) and function composition. Commonly, the allowed functions are n th root, exponential function, logarithm, and ...

  6. List of Unicode characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Unicode_characters

    A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.

  7. John Mighton - Wikipedia

    en.wikipedia.org/wiki/John_Mighton

    John Mighton. John Mighton, OC born in Hamilton, Ontario, Canada on October 2, 1957, is a Canadian mathematician, playwright and best-selling author, who is known for his work supporting children's math. [1] Mighton founded JUMP Math as a charity in 2002 and developed the JUMP Math program to address student underachievement in math.

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