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In mathematics, the trigamma function, denoted ψ1(z) or ψ(1)(z), is the second of the polygamma functions, and is defined by
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| Trigamma function | related to Appearance | The | 0.60 | section |
| Trigamma function | related to Recurrence and reflection formulae | The | 0.60 | section |
| Trigamma function | related to References | Milton Abramowitz | 0.60 | section |
| Trigamma function | related to References | Irene | 0.60 | section |
| Trigamma function | related to References | Stegun | 0.60 | section |
| Trigamma function | related to References | Handbook | 0.60 | section |
| Trigamma function | related to References | Mathematical Functions | 0.60 | section |
| Trigamma function | related to References | Dover Publications | 0.60 | section |
| Trigamma function | related to References | New York | 0.60 | section |
| Trigamma function | related to References | ISBN | 0.60 | section |
| Trigamma function | related to References | See | 0.60 | section |
| Trigamma function | related to References | Weisstein | 0.60 | section |
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