Category:1891 in mathematics
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Deutsch: 1891 in der Mathematik
English: 1891 in mathematics
Subcategories
This category has the following 2 subcategories, out of 2 total.
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Media in category "1891 in mathematics"
The following 2 files are in this category, out of 2 total.
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Perigal 1891.djvu 2,480 × 3,508, 9 pages; 769 KB