Therefore in LaTeX: Symbol, Package and Because Sign

Short answer: in LaTeX the therefore sign (∴) is the command \therefore, typed inside math mode, for example $x > 0 \therefore x^2 > 0$. It comes from the AMS symbol set, so load amssymb (or amsmath) in the preamble. The matching because sign (∵) is \because. Both are documented in Scott Pakin’s Comprehensive LaTeX Symbol List, which this page checked on 2026-11-07.

This guide is for researchers, analysts and students typesetting proofs, derivations and logic arguments. After reading it you should be able to add either symbol, know what class of symbol it is (and why that affects spacing), fix the usual error, and choose an alternative glyph package if the default shape is not the one you want.

What therefore and because are used for in research writing

The therefore sign marks a conclusion that follows from the lines above it; the because sign marks a reason. Both appear in proofs, derivations and logic notation. In Unicode they are separate characters: U+2234 THEREFORE and U+2235 BECAUSE, both in the Mathematical Operators block (U+2200 to U+22FF) of the Unicode code charts.

The symbol list classes them as binary relations, in the same family as \approx or \sim. That classification is the detail most short answers omit, and it is why the commands behave as they do in the sections below.

Install or access: the AMS packages

The symbol list explains that a table caption names the package you need to load, and that “AMS” in a caption means the AMS packages, amssymb and/or amsmath. \therefore and \because sit in Table 132, “AMS Binary Relations” (page 74 of the version read), so the preamble needs:

\usepackage{amssymb}

The symbol list itself is published on CTAN (the Comprehensive TeX Archive Network) at ctan.net/info/symbols/comprehensive/symbols-a4.pdf. Check its table caption before adding any symbol from it: the caption, not the command name, tells you which package to load.

Step by step: add therefore and because to a document

1. Add \usepackage{amssymb} to the preamble (before \begin{document}).
2. Type the command inside math mode, either inline with $ ... $ or in a display environment such as \[ ... \] or equation.
3. For a conclusion: $x > 0 \therefore x^2 > 0$.
4. For a reason: $x^2 > 0 \because x > 0$.
5. Compile. Both commands take no arguments, so there are no braces after them.

latex therefore in a text line

Because these are math-mode symbols, a bare \therefore in running text should be wrapped in dollar signs: write $\therefore$ rather than \therefore.

Spacing: why a relation symbol looks different from a plain glyph

Because the symbol list defines both commands as binary relations, TeX sets relation spacing around them, as it does around =. The symbol list illustrates the same principle with \mid and |: one is a binary relation and the other a math ordinal, so LaTeX typesets them with different surrounding spacing. If a line of the form “A ∴ B” looks too loose or too tight, the class of the symbol, not a missing space, is the cause.

Output and how to read it

\therefore prints three dots arranged as a triangle with one dot above two (∴). \because prints the same arrangement inverted, one dot below two (∵). The symbol list’s tables show each command beside its glyph, so you can compare your output with the published shape.

Command	Glyph	Unicode	Symbol class (symbol list)
\therefore	∴	U+2234 THEREFORE	Binary relation (AMS, Table 132)
\because	∵	U+2235 BECAUSE	Binary relation (AMS, Table 132)

Troubleshooting

“Undefined control sequence” on therefore

The command is not defined by the LaTeX core. Add \usepackage{amssymb} (or amsmath) to the preamble, as the symbol list’s note on AMS tables directs, then recompile.

The symbol appears in the wrong place or the compile fails in text

Move the command inside $ ... $ or a math environment.

You want to paste the character directly

The character exists in Unicode (U+2234 and U+2235), so a Unicode-capable setup can accept it as typed text. The symbol list notes that packages built on Unicode fonts, such as newcomputermodern, require LuaLaTeX or XeLaTeX and are intended to be used by entering Unicode characters directly. If your journal template uses pdfLaTeX, keep to the commands above.

Alternative glyph packages

Other symbol packages in the symbol list define their own versions of the three-dot symbol. Use one only if you need a different shape or direction; each needs its own package loaded, and the AMS commands remain the default choice.

Package	Command(s)	What the symbol list says
AMS (amssymb)	\therefore, \because	Defined as binary relations; listed in Table 132 and Table 370 (AMS Dots).
wasysym	\wasytherefore	Listed in Table 371 (wasysym Dots).
MnSymbol	\uptherefore, \downtherefore, \lefttherefore, \righttherefore	Listed in Table 372. MnSymbol defines \therefore as \uptherefore and \because as \downtherefore.
FdSymbol	\uptherefore, \downtherefore, \lefttherefore, \righttherefore	Listed in Table 373. FdSymbol defines \therefore as a synonym for \uptherefore and \because for \downtherefore.

Loading several symbol packages together can redefine \therefore and \because, because MnSymbol and FdSymbol both define those names. If your symbols change shape after adding a package, check which package defined them last.

FAQ

What is the LaTeX command for the therefore symbol?

\therefore, used in math mode, with amssymb or amsmath loaded.

What is the because sign in LaTeX?

\because, from the same AMS table (Table 132) as \therefore.

Does “latex therefore” mean the word or the symbol?

The symbol. The word “therefore” is ordinary text and needs no command; \therefore produces ∴.

Is therefore a binary operator or a relation in LaTeX?

A binary relation, according to the Comprehensive LaTeX Symbol List.

Can I use the Unicode character instead?

The characters are U+2234 THEREFORE and U+2235 BECAUSE. Direct entry suits Unicode-based engines and fonts; with pdfLaTeX use the commands.

Related CASRAI guides

• LaTeX lim: lim Syntax, Limit Under and Inline Placement, another math-mode command with spacing considerations.
• LaTeX mathbb: Blackboard Bold Math Guide, for number-set symbols that need an AMS package.
• LaTeX and Overleaf for Collaborative Research Writing.
• LaTeX Bibliography Styles Explained.

Sources

• Scott Pakin, The Comprehensive LaTeX Symbol List, CTAN: symbols-a4.pdf. Read 2026-11-07 (Table 132, Tables 370 to 373, and the notes on AMS packages).
• The Unicode Consortium, Mathematical Operators code chart (U+2200 to U+22FF): unicode.org/charts/PDF/U2200.pdf. Read 2026-11-07 (U+2234 THEREFORE, U+2235 BECAUSE).