21st July

Mathematicians who were born or died on 21st July


Mathematicians born on this day:

1620 : Jean Picard
1848 : Emil Weyr
1849 : Robert Woodward
1861 : Herbert Ellsworth Slaught
1895 : Erich Hans Rothe
1926 : John Leech

Mathematicians who died on this day:

1873 : Delfino Codazzi
1925 : Giovanni Frattini
1937 : Edwin Elliott
1966 : Francesco Cantelli
1966 : Philipp Frank
1974 : Carlos Benjamin de Lyra
1993 : Edwin Pitman
2016 : Roger Godement

Posters available   (Click on a link below)

Emil Weyr John Leech Francesco Cantelli


A quotation for today

Robert Woodward (1849 - 1924)

The theory of probabilities and the theory of errors now constitute a formidable body of knowledge of great interest and of great practical importance. Though developed largely through the applications to the more precise sciences of astronomy, geodesy and physics, their range of applicability extends to all the sciences; and they are plainly destined to play an increasingly important role in the development and in the applications of the sciences of the future. Hence their study is not only a commendable element in a liberal education, but some knowledge of them is essential to a correct understanding of daily events.

Probability and Theory of Errors



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School of Mathematics and Statistics
University of St Andrews, Scotland
https://www-history.mcs.st-andrews.ac.uk/Day_files/Day721.html