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  2. Friendship graph - Wikipedia

    en.wikipedia.org/wiki/Friendship_graph

    The friendship graphs F 2, F 3 and F 4. In the mathematical field of graph theory, the friendship graph (or Dutch windmill graph or n-fan) F n is a planar, undirected graph with 2n + 1 vertices and 3n edges. [1] The friendship graph F n can be constructed by joining n copies of the cycle graph C 3 with a common vertex, which becomes a universal ...

  3. List of mathematical abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical...

    This following list features abbreviated names of mathematical functions, function-like operators and other mathematical terminology. This list is limited to abbreviations of two or more letters (excluding number sets).

  4. Glossary of mathematical symbols - Wikipedia

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

    A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula.

  5. Theorem on friends and strangers - Wikipedia

    en.wikipedia.org/wiki/Theorem_on_friends_and...

    78 of the 156 possible friends-strangers graphs with 6 nodes. The other 78 can be obtained by reversing the red and blue colours of each graph. For each graph the red/blue nodes shows a sample triplet of mutual friends/strangers. The theorem on friends and strangers is a mathematical theorem in an area of mathematics called Ramsey theory.

  6. List of letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/List_of_letters_used_in...

    Latin and Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities.

  7. What ‘Elsbeth’ Taught Me About Friendship - AOL

    www.aol.com/elsbeth-taught-friendship-104525430.html

    Their friendship is a love letter to the underlying, often forgotten things that keep us connected in real life: acceptance and compassion. Kaya embraces her friend’s quirkiness and likes her ...

  8. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.

  9. All 8 'Friends' Christmas Episodes, Ranked (Plus, Where to ...

    www.aol.com/8-friends-christmas-episodes-ranked...

    Not only is Friends one of the most decorated television shows of all-time, the series also has some of the most enjoyable Christmas episodes. For starters, how about "The One with the Armadillo ...