magic number

1. Any of the numbers, 2, 8, 20, 28, 50, 82, or 126, that represent the number of neutrons or protons in strongly bound and exceptionally stable atomic nuclei.

2. Sports The number of wins by a leading team and losses by its closest competitor required in order for the leading team to capture a championship or secure a playoff spot.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

magic number

1. (General Physics) physics any of the numbers 2, 8, 20, 28, 50, 82, and 126. Nuclides with these numbers of nucleons appear to have greater stability than other nuclides

2. (Chemistry) chem a number of atoms that is particularly stable in certain types of compound that have clusters of the same type of atom

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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Noun

magic number - the atomic number of an extra stable strongly bound atomic nucleus: 2, 8, 20, 28, 50, 82 or 126

atomic number - the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element

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References in periodicals archive

The magic constant when the pips are added is the perfect 28.

A PERFECT MAGIC SQUARE

An H-magic labeling of Gisabijection [mathematical expression not reproducible] is a constant k for each [H.sub.i] in the H-covering, and k is called a magic constant. An H-magic labeling f is called an H-supermagic labeling if f(V(G)) = [1, [absolute value of V(G)]].

Star-Supermagic Decompositions of the Complete Bipartite Graph Minus a One-Factor

A fuzzy graph (Eq.) is knows as a fuzzy magic graph if there exist two bijective functions (Eq.) and (Eq.) ]such that (Eq.) and (Eq.) for all (Eq.) where (Eq.) is a fuzzy magic constant. Additionally, we investigated that fuzzy paths, fuzzy stars and fuzzy cycles are fuzzy magic graphs.

ON THE CONSTRUCTION OF FUZZY MAGIC GRAPHS

If G has an edge-magic labeling with magic constant h then GJ has edge-magic labelings with magic constants 3(n - 1)([m.sub.1] + [m.sub.2] +...

Rainbow eulerian multidigraphs and the product of cycles

Is it possible to construct another 3 by 3 magic square using the numbers 1 through 9 where the magic constant is any other value than 15?

Magic squares from primary classroom to postgraduate research in 10 simple exercises: Tim Roberts invites students and their teachers to engage with the mathematics of magic squares

There are 36 sets of four squares that sum to the magic constant 16.

WHAT'S REALLY MAGIC ABOUT MAGIC SQUARES

In [1], Kotzig and Rosa introduced the concepts of edge-magic labeling and edge-magic graph as follows: an edge-magic labeling of a graph G is a bijection f : V(G) U E(G) [right arrow] {1, 2, 3, ..., v + e} such that f(x) + f(xy) + f(y) is a constant, called the magic constant of f, for every edge xy of G.

New Results on the (Super) Edge-Magic Deficiency of Chain Graphs

A bijection : V E {1,...,| V | | E |} is an H -magic labeling of G if there exist a positive integer c (called the magic constant), such that for any subgraph H (V , E) of isomorphic to H , the sum (v) (e) is equal to magic constant c .

ON CYCLE ANTI-SUPERMAGIC LABELLING OF ISOMORPHIC COPIES OF LADDER AND TRIANGULAR LADDER