What's the meaning of this symbol?

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Discussion Overview

The discussion centers around the meaning of various mathematical symbols, specifically focusing on the equal sign with a triangle over it and other relational operators. The scope includes conceptual clarification of mathematical notation.

Discussion Character

  • Conceptual clarification, Technical explanation

Main Points Raised

  • One participant inquires about the meaning of the equal sign with a triangle over it.
  • Another participant references Wikipedia, suggesting that the symbol means "is defined as" or "is equal by definition," noting variability in usage among different authors.
  • A separate inquiry is made regarding the meanings of various relational symbols, including =, <>, !=, >, <, !<, <=, and !>.
  • A subsequent response provides definitions for these symbols, explaining their meanings in relation to equality and inequality.

Areas of Agreement / Disagreement

Participants present differing views on the meanings of the symbols, with some definitions provided but no consensus reached on the interpretations of all symbols discussed.

Contextual Notes

Some definitions may depend on specific contexts or conventions in mathematical literature, and there may be variations in symbol usage among different authors.

Asuralm
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Dear All:

What's the meaning of a equal sign with a triangle over it please?

Thanks in advance
 
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I will confess that I did not recognize that immediately but according to Wikipedia:
http://en.wikipedia.org/wiki/Table_of_mathematical_symbols
(down near the bottom of the page) it means "is defined as" or "is equal by definition".
After seeing that definition, my reaction was, "Oh, yes, of course, I've seen that before".
Different authors use different symbols for that.
 
Dear All

what is the meaning of these symbols =,<>,!=,>,<,!<,<=,!>
 
= means "is equal to"
> means "is greater than"
< means "is less than"
<> means "is either less than or greater than" or simply "is not equal to"

! is a commonly used to mean "not"
!= means "is not equal to"
!> means "is not greater than"
!< means "is not less than"
 

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