28 มกราคม
1699 : Leibniz elected the first foreign member of the French Academy.
1855 : William Burroughs born.
29 มกราคม
1697 : Newton received two challenge problems from Johann Bernoulli , one being the Brachistochrone problem published in Acta eruditorum the previous June and addressed "to the shrewdest mathematicians in the world." The next day Newton posted his solution to the Royal Society. When Bernoulli saw the anonymous solution, he recognized it as "ex ungue leonem" (as the lion is recognized by his paw).
1700 : Daniel Bernoulli born.
1810 : Kummer born.
30 มกราคม
1619 : Michelangelo Ricci born. In 1666, he found the tangent lines to the parabolas of Fermat .
31 มกราคม
1715 : Birthdate of Giovanni Francesco Fagnano dei Toschi , son of Giulio Carlo Fagnano. He calculated the integral of the tangent.
1 กุมภาพันธ์
1673 : Leibniz , during his first visit to London, exhibits his calculating machine to the Royal Society.
2 กุมภาพันธ์
1522 : Ludovico Ferrari born.
1903 : Bartels Van der Waerden born.
3 กุมภาพันธ์
1692 : De la Pryme records in his diary that Newton had a fire in his study that destroyed the manuscript of his Optics. "Everyone though he would have run mad; he was so troubled..."
1898 : P. Urysohn born.
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