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⨒

line integration with rectangular path around pole

Line Integration With Rectangular Path Around Pole

⨒ marks a line integral that follows a rectangular route around a pole, a point where a complex function grows without bound. The surrounding formula supplies the function and its limits.

Text symbol

Search it as: rppolint · rectangular pole integral · line integral around a pole · rectangular contour integral · LaTeX rppolint · HTML rppolint
Shows up in: Anything that takes text · its shape is whatever your font draws

What ⨒ means

It marks a rectangular route that goes around a pole. In complex analysis, a pole is a point where a function grows without bound. The surrounding formula supplies the function and its limits.

In LaTeX, the unicode-math package defines \rppolint. A 2003 ISO/IEC draft on science and math markup also lists rppolint as a named entity—a short label that lets markup call up a character.

Why does ⨒ show as a box?

The math font may be missing its glyph. A 2023 coverage comparison lists the symbol in STIX Two Math, Cambria Math, and Noto Sans Math, but not Libertinus Math. If it turns into a box, check which math font renders the formula.

Don't confuse it with

⨓

Line Integration With Semicircular Path Around Pole

shares “around”, “integration”, “line”, “path”, “pole”

⨔

Line Integration Not Including The Pole

shares “integration”, “line”, “pole”

⨑

Anticlockwise Integration

shares “integration”

⨕

Integral Around A Point Operator

shares “around”

Questions people ask

Why does ⨒ show as a box on some devices?

Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.

How to type ⨒

Windows (Word)

Alt+XType 2A12, then Alt+X to get ⨒.

Windows

Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).

macOS

Control+Command+SpaceOpen the character viewer and search “line integration with rectangular path around pole”.

Linux

Ctrl+Shift+UType 2a12, then Enter or Space.

HTML

⨒

CSS

\2A12

LaTeX with unicode-math

Use `\rppolint`; the command is defined by `unicode-math`. Check that the math font includes U+2A12.

HTML

Use `&rppolint;` as the named character reference, or `⨒` as the hexadecimal numeric reference.

Codes and encoding1 code points

HTML decimal

⨒

HTML hex

⨒

CSS content

content: "\2A12";

Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.

URL encoded

%E2%A8%92

On screen

Code points

JS .length

UTF-8 bytes

A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

Families this belongs to

Maths & numbers1,835 symbols

1️⃣📏📐✖️➕➖➗🟰♾️#️⃣*️⃣0️⃣