Summation Bottom Symbol
⎳ is the “summation bottom” symbol used as the lower limit in summation notation.
U+23B3
⎳ is known as the Summation Bottom. It corresponds to the Unicode code point U+23B3 and is typically used alongside the summation sign to show a lower limit. This page helps you copy, paste, and find practical uses for the symbol.
Summation Bottom Symbol Meaning
⎳ (Unicode name: “SUMMATION BOTTOM”, U+23B3) is a technical/math symbol representing the bottom (lower bound) part of summation notation. In typeset math, it often appears paired with a summation operator and a top limit, helping convey expressions like “sum from i = …” or “sum over a range starting at …”. It’s also used in plain-text or Unicode-friendly contexts to approximate layout when full mathematical typography (like LaTeX rendering) isn’t available. In software and design workflows, it’s mainly used for precise symbol placement rather than as a standalone concept.
Common uses
- •Writing summation expressions in Unicode-only text
- •Designing equation-like UI labels or diagrams where rich math rendering isn’t available
- •Using as a lower limit marker next to summation operators in documentation
- •Creating typographic templates for math symbols in editors and CMS content
- •Referencing or copying summation-limit glyphs for technical posts and tutorials
Examples
⎳ Summation Bottom Symbol
- ⎳Σ ⎳ i=0
- ⎳∑ ⎳ k=1 n
- ⎳S = Σ⎳ i=1^n a_i
- ⎳Compute total: ⎳ t=0 with step size
- ⎳Sum_{i} notation bottom: ⎳ i=2
Variations
Ready to copy
Technical codes
| Unicode | U+23B3 | |
| HTML Entity | ⎳ | |
| HTML Code | ⎳ | |
| CSS | \23B3 | |
| Alt Code | Alt + 9139 | |
| Decimal | 9139 |
How to type Summation Bottom Symbol (⎳)
On Windows
Hold Alt and type 9139 on the numeric keypad. In Word, type 23B3 then press Alt + X.
On Mac
Switch to the Unicode Hex Input keyboard, then hold Option and type 23B3. Or press Control + Command + Space and search.
On Linux
Press Control + Shift + U, type 23b3, then press Enter or Space.
Anywhere
Copy ⎳ with the button above and paste it wherever you need it — this works on every device and in every app, with no keyboard shortcut to remember.
FAQ
What does the Summation Bottom symbol mean?
⎳ (Unicode name: “SUMMATION BOTTOM”, U+23B3) is a technical/math symbol representing the bottom (lower bound) part of summation notation. In typeset math, it often appears paired with a summation operator and a top limit, helping convey expressions like “sum from i = …” or “sum over a range starting at …”. It’s also used in plain-text or Unicode-friendly contexts to approximate layout when full mathematical typography (like LaTeX rendering) isn’t available. In software and design workflows, it’s mainly used for precise symbol placement rather than as a standalone concept.
Is ⎳ the same as a summation sign (Σ)?
No. ⎳ is the “summation bottom” (lower limit). It’s typically used with a summation operator like Σ or ∑ and, often, a top limit.
What is the Unicode code point for ⎳?
⎳ is U+23B3.
How can I type ⎳ in HTML?
Use the HTML entity: ⎳.
How can I type ⎳ in JavaScript?
Use the escape form: \\u{23B3}.