The 18th century theorem states e^(i) pi+1=0, where e is the base of the natural logarithm, (i) the

**imaginary unit**and pi the ratio of a circle's circumference to its diameter.This definition appears very frequently and is found in the following Acronym Finder categories:

- Science, medicine, engineering, etc.

See other **definitions of j**

- Abbreviation Database Surfer
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- Impact Zone Wrestling
- Infekcyjne Zapalenie Wsierdzia (Polish: Infective Endocarditis)
- Institute for Zoo and Wildlife (Berlin, Germany)
- Institute for Zero Waste in Africa (South Africa)
- Ischemic Zone Wall Thickening
- International Zoo Yearbook
- Inverse Zig-Zag Ordering
- Angular Momentum Quantum Number (used in formulae in quantum physics)
- Business Class
- Federal Reserve Bank of Kansas City, Missouri (designates original point of circulation of a dollar bill)

The 18th century theorem states e^(i) pi+1=0, where e is the base of the natural logarithm, (i) the **imaginary unit** and pi the ratio of a circle's circumference to its diameter.

When typing complex numbers into a Mathcad formula, it is important to note that i or j alone cannot be used to represent the **imaginary unit**.