a matrix with the lower-left half equal to the mirror image of the upper-right half; a matrix that is its own transpose.
Can you see the difference between those symbols?Though one of the least-used letters, X has a remarkable way of getting attention. We’ve already looked at the varied uses of X: Gen X, Xbox, XOXO, the X chromosome. British dramatist Ben Jonson wanted to remove the 24th letter from the alphabet, saying, that x “is rather an abbreviation, or way of short writing, than a letter: for it hath the sound of c and s, or k and s.” …
red pillRead more in this article about some frequently asked questions and fun facts related to our definitions.
- symmetric difference,
- symmetric function,
- symmetric group,
- symmetrical gangrene,
- symmetry element
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012