How do you write the "estimate" equal sign?

Question

I'm looking for a code, which can depict the estimate equal sign as in http://en.wikipedia.org/wiki/Equals_sign#Other_related_symbols (6th sign: ESTIMATES).

possible duplicate of How to look up a symbol or identify a math alphabet? — Johannes_B, Apr 07 '14 at 08:36
The marvosym package has a similar symbol called \Corresponds, but it's not exactly the same. — Ian Thompson, Apr 07 '14 at 08:45

score 7 · Answer 1 · edited Apr 13 '17 at 12:35

The following summarizes many variants of the estimate symbol without changing all math symbols.

\newcommand*{\estimatesA}{\mathrel{\hat=}}

Source: Bernard's answer, Johannes_B's comment

\newcommand*{\estimatesB}{\mathrel{\widehat=}}

Source: DanteFAQ, Bernard's answer

\newcommand*{\estimatesC}{\stackrel{\scriptscriptstyle\wedge}{=}}

Source: DanteFAQ
Remark: Recommended for \displaystyle and \textstyle only, in the smaller styles, the \wedge becomes too large.

\newcommand*{\estimatesD}{\hateq} % MnSymbol

Source: Jukka K. Korpela's answer

\newcommand*{\estimatesE}{\corresponds} % mathabx

Source: The Comprehensive LaTeX Symbol List

\newcommand*{\estimatesF}{\mathrel{\text{\Corresponds}}} % marvosym

Source: Ian Thompson's comment

\documentclass{article}

\newcommand*{\estimatesA}{\mathrel{\hat=}}
\newcommand*{\estimatesB}{\mathrel{\widehat=}}
\newcommand*{\estimatesC}{\stackrel{\scriptscriptstyle\wedge}{=}}
\newcommand*{\estimatesD}{\hateq} % MnSymbol
\newcommand*{\estimatesE}{\corresponds} % mathabx
\newcommand*{\estimatesF}{\mathrel{\text{\Corresponds}}} % marvosym

\usepackage{marvosym,amstext}

\makeatletter

% \hateq from MnSymbol
% \usepackage{MnSymbol}
\@ifpackageloaded{MnSymbol}\@tempswafalse\@tempswatrue
\if@tempswa
  \DeclareFontFamily{U}{MnSymbolD}{}%
  \DeclareSymbolFont{MnSyD}{U}{MnSymbolD}{m}{n}%
  \SetSymbolFont{MnSyD}{bold}{U}{MnSymbolD}{b}{n}%
  \DeclareFontShape{U}{MnSymbolD}{m}{n}{
      <-6>  MnSymbolD5
     <6-7>  MnSymbolD6
     <7-8>  MnSymbolD7
     <8-9>  MnSymbolD8
     <9-10> MnSymbolD9
    <10-12> MnSymbolD10
    <12->   MnSymbolD12}{}%
  \DeclareFontShape{U}{MnSymbolD}{b}{n}{
      <-6>  MnSymbolD-Bold5
     <6-7>  MnSymbolD-Bold6
     <7-8>  MnSymbolD-Bold7
     <8-9>  MnSymbolD-Bold8
     <9-10> MnSymbolD-Bold9
    <10-12> MnSymbolD-Bold10
    <12->   MnSymbolD-Bold12}{}%
  \DeclareMathSymbol{\hateq}{\mathrel}{MnSyD}{61}% 
\fi

% \corresponds from mathabx
% \usepackage{mathabx}
\@ifpackageloaded{mathabx}\@tempswafalse\@tempswatrue
\if@tempswa
  \DeclareFontFamily{U}{mathb}{\hyphenchar\font45}%
  \DeclareFontShape{U}{mathb}{m}{n}{
        <5> <6> <7> <8> <9> <10> gen * mathb
        <10.95> mathb10 <12> <14.4> <17.28> <20.74> <24.88> mathb12
        }{}%
  \DeclareSymbolFont{mathb}{U}{mathb}{m}{n}%
  \DeclareFontSubstitution{U}{mathb}{m}{n}%
  \DeclareMathSymbol{\corresponds}{\mathrel}{mathb}{"1D}%
\fi
\makeatother

\begin{document}
\[
  A \estimatesA
  B \estimatesB
  C \estimatesC
  D \estimatesD
  E \estimatesE
  F \estimatesF
  G
\]
\end{document}

OpenType fonts

LuaTeX and XeTeX support OpenType fonts. Package unicode-math supports OpenType math fonts. The symbol ≙ can then be used in different ways:

Direct in put of the Unicode symbol: ≙
ASCII notation of the symbol: ^^^^2259
Command name (package unicode-math): \wedgeq

The following example shows the symbols from three OpenType math fonts (Family name/PostScript name/font name):

Latin Modern Math/LatinModernMath-Regular/latinmodern-math.otf
Asana Math/Asana-Math/Asana-Math.otf
XITS Math/XITSMath/xits-math.otf

\documentclass{article}

\usepackage{unicode-math}

\AtBeginDocument{%
  \setmathfont{latinmodern-math.otf}%
  \newsavebox\BoxG\sbox\BoxG{$\wedgeq$}%
  %
  \setmathfont{Asana-Math.otf}%
  \newsavebox\BoxH\sbox\BoxH{$\wedgeq$}%
  %
  \setmathfont{xits-math.otf}%
  \newsavebox\BoxI\sbox\BoxI{$\wedgeq$}%
  %
  \setmathfont{latinmodern-math.otf}%
}

\newcommand*{\test}[1]{\mathrel{\copy#1}}

\begin{document}
\[
  G \test\BoxG
  H \test\BoxH
  I \test\BoxI
  J
\]
\end{document}

it's in unicode at U+2259, so it's in the stix and xits fonts, perhaps with the name \wedgeq. — barbara beeton, Apr 07 '14 at 14:26
@barbarabeeton: Thanks, I have now added three OpenType math fonts that are supported by package unicode-math. — Heiko Oberdiek, Apr 07 '14 at 14:52

Bernard · Answer 2 · 2014-07-23T12:24:37.543

5

Just with \mathrel{\hat{=}}. Or with \widehatif you like. More precisely:

\documentclass[12pt, a4paper]{article}

\usepackage{amsmath}%
\newcommand*\estimates{\mathrel{\hat{=}}}
\newcommand*\wideestimates{\mathrel{\widehat{=}}}


\begin{document}

\begin{align*}
   & A \estimates B  \\
   & A \wideestimates B  \\
  & A = B
\end{align*}

\end{document}

enter image description here

edited Jul 23 '14 at 12:24

answered Apr 07 '14 at 08:56

Bernard

271,350

Or, maybe better, \widehat – egreg Apr 07 '14 at 08:56
I tried it and found it a little too large. But you're right, as it's a mattert of taste, I'll add it. – Bernard Apr 07 '14 at 09:02

score 0 · Answer 3 · answered Apr 07 '14 at 08:47

0

You can use \hateq from the mnsymbol package:

\documentclass{article}
\usepackage{mnsymbol}
\begin{document}
$$a \hateq b$$
\end{document}

An alternative is to use \corresponds from mathabx, but it does not quite look right.

answered Apr 07 '14 at 08:47

Jukka K. Korpela

2,757

But don't use $$ in a LaTeX document! – Ian Thompson Apr 07 '14 at 08:50
It is better to avoid $$..$$, as per Why is [ … ] preferable to $$ … $$? – Claudio Fiandrino Apr 07 '14 at 08:50
4

Usual caveat: MnSymbol.sty (which is the correct name) changes *all* math symbols. – egreg Apr 07 '14 at 08:57

score 0 · Answer 4 · answered Oct 05 '14 at 20:27

0

There is a latex symbol for this : $\triangleq$

ref: http://ia.wikipedia.org/wiki/Wikipedia:LaTeX_symbols

answered Oct 05 '14 at 20:27

ifmm78

1

1

Is \triangleq used as an estimate equal sign? I rather know of the wedge form, as some users already suggested... This is a rather a comment than an answer. – Oct 05 '14 at 20:32

How do you write the "estimate" equal sign?

4 Answers4

OpenType fonts

Linked