Plaza, Ángel2024-09-042024-09-042006-12-01Teaching Mathematics and Computer Science, Vol. 4 No. 2 (2006) , 451-4521589-7389https://hdl.handle.net/2437/379594There are many expressions for number π as infinite series or infinite product (see for example [1, 2, 3]). In [1] the following series for number π is attributed to K. Knopp:...application/pdfproof without wordsfolyóiratcikkOpen AccessÁngel Plazahttps://doi.org/10.5485/TMCS.2006.0143Teaching Mathematics and Computer Science24Teach. Math. Comp. Sci.2676-8364