intexgral

intexgral – A LaTeX package for typesetting integrals

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Requirements

The package requires pkginfograb and derivative. Having installed these packages should normally ensure a LaTeX3 version newer than 2025-05-14, which is necessary for the good functioning of intexgral.

Installation

The latest version can be found on its CTAN page.

Usage

Simply write

\usepackage{intexgral}

in the preamble of your document.

Description

The package provides a central macro \integral that helps typeset integrals. As it only contains one argument – the integrand – its use is heavily dependent of a key = value interface. The latter allows the user to customise many elements of an integral, including:

On the package side

• Adaptation of the style to physics papers convention.
• Selection of the order of limits input.
• Choosing between upright or italic d for differentials.

On the macro side

• Changing the symbol.
• Automate the composition of integrals with limits.
• Fine adjustment of differentials.
• Inclusion of the Jacobian.

The package also offers a couple of auxiliary macros to help enhance the use of some keys:

• \NewLimitsKeyword (and its variant) to associate keywords with common limits.
• \NewVariableKeyword (and its variant) to associate keywords to common lists of differential (and Jacobian).
• NewSymbolKeyword (and its variant) to associate symbols to user-friendly keys.
• \differentials to precisely place the differentials wherever the user wants to.

and much more… See the documentation for exhaustive presentation of all the features along with examples.

Author

Copyright 2025-present Valentin Dao

This work may be distributed and/or modified under the conditions of The LaTeX Project Public License v1.3c or later.

This work has the LPPL status maintained.

The current maintainer of of this work is Valentin Dao ([email protected])

Contribution: Anthony Saint-Criq

This work consits of the files

• README.md (this file)
  • Quick introduction to the package.
• build.lua
  • Configuration file to build the package.
• intexgral.ins
  • Installation file to extract the different main components of the package.
• intexgral-fr.dtx
  • The Documented TeX file containing the French documentation
• intexgral-en.dtx
  • The Documented TeX file containing the English documentation

Both .dtx files, when run through the .ins file, will produce the following:

• intexgral.sty
  • The source code of the package.
• intexgral-fr.pdf
  • The French documentation in PDF format.
• intexgral-en.pdf
  • The English documentation in PDF format.

Change log

• Version 3.0.1 (2026-01-02)
  • Fixed bug with jacobian and special syntax (issue #3).
  • Fixed French and English documentations (issues #4, #6 and #7).
  • Changed positive and real limits keywords; they now contain a + sign (issue #5).
• Version 3.0.0 (2025-12-24)
  • Added special syntax.
  • Added domain* and mode keys.
  • Added \IntegralSetup and \NewSymbolKeyword macros.
  • Removed \defaultdiff, \defaultvdiff and \vdiffstyle in favour of \IntegralSetup.
  • Removed keys controlling both the symbol and the limits, now managed at a higher level through \NewSymbolKeyword.
  • Removed int-split key in favour of mode.
  • Removed \NewIntegralSymbol
  • Modified the names of some keys (variables to variables, lower-lim and upper-lim to llimit and ulimit, int-symb to symbol, invert-differentials and hide-differentials to invert-diff and hide-diff).
  • Assigned hide-diff to a local option rather than a package one.
  • Assigned limits-mode to a package option instead of a macro key.
• Version 2.0.1 (2025-09-13)
  • Compatibiliy issue between unicode-math and amssymb depending on the loading order (issue #2)
• Version 2.0.0 (2025-09-09)
  • Added \intexgralsetup, \defaultdiff, \defaultvdiff and \vdiffstyle.
  • Changed warning messages related to non-existing symbols. They are now only triggered when the integral is typeset.
  • Removed diff-vec_style key in favour of \vdiffstyle and warning messages about misuse of semi-colon in conjunction with the int-split key.
  • Fixed bug where the integrand was not reset when \integral was used successively in the same TeX group. Details can be found here.
• Version 1.1.0 (2025-07-29)
  • Added starred variants for the keys controlling both the symbol and and the limits (keys single, contour etc).
• Version 1.0.0 (2025-07-26)
  • Initial version

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