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Spouge's approximation
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<h2 id="see-also">See also</h2> <ul><li><a href="/facts/Stirling%27s_approximation/GfxV3BUH">Stirling's approximation</a></li> <li><a href="/facts/Lanczos_approximation/E9UM2a9W">Lanczos approximation</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Spouge, John L. (1994). "Computation of the Gamma, Digamma, and Trigamma Functions". SIAM Journal on Numerical Analysis. 31 (3): 931–000. doi:10.1137/0731050. JSTOR 2158038. <a href="https://zenodo.org/record/1236136" target="_blank">https://zenodo.org/record/1236136</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>* Pugh, Glendon (2004). An analysis of the Lanczos Gamma approximation (PDF) (PhD thesis). <a href="http://web.mala.bc.ca/pughg/phdThesis/phdThesis.pdf" target="_blank">http://web.mala.bc.ca/pughg/phdThesis/phdThesis.pdf</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> </ol>