Leech, John The problem of the thirteen spheres. (English) Zbl 0070.17601 Math. Gaz. 40, 22-23 (1956). Reviewer: Kurt Schütte Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 25 Documents MSC: 52C17 Packing and covering in \(n\) dimensions (aspects of discrete geometry) Keywords:integral geometry × Cite Format Result Cite Review PDF Full Text: DOI Online Encyclopedia of Integer Sequences: Maximal kissing number in n dimensions: maximal number of unit spheres that can touch another unit sphere.