July 20

Simin Beh’bahāni

Simin Beh’bahāni (Persian: سیمین بهبهانی) (born July 20, 1927) Iranian poet – A Cup of Sin: Selected Poems (1999)

Read more about Beh'bahani here

Watch a short video about Simin Beh'bahani
 here


Olga Hahn Neurath

Olga Hahn Neurath (born July 20, 1882) Austrian mathematician and philosopher – Zum Dualismus in der Logik (“On Dualism in Logic”) by Otto Neurath and Olga Hahn in Archiv fur Systematische Philosophie 15 (1909)

Read more about Olga Hahn-Neurath here

Women of the Vienna Circle

Among the members of the Vienna Circle were a female philosopher, Rose Rand, and two female mathematicians, Olga Hahn-Neurath and Olga Taussky. Olga Hahn (1882-1937) was the sister of Hans Hahn, the mathematician, and fellow member of the Vienna Circle. She studied mathematics and philosophy at the University of Vienna from 1902, and received her PhD in 1911. Hahn was triply marginalized as a woman, a Jewish scholar, and a person with a disability. She had become blind at the age of 22 as the result of an inflammation of the optic nerve. While still writing her PhD, she published her first paper on the algebra of classes in Schröder's logic, setting out to axiomatize Schröder's system (Hahn 1909). Soon afterwards, she and Neurath published a joint paper, proposing key revisions to the axioms and proof procedure of Schröder's system (Hahn and Neurath 1909). Hahn was awarded her PhD for a paper on the theory of inference (Hahn 1910).


Dilys Powell

Dilys Powell (born July 20, 1901) U.K. film critic, essayist – The Golden Screen: Fifty years at the films (1989)

Listen to Dilys Powell, at age 90, speak about film criticism here

Dilys Powell speaks in this 1946 news film
 here


Imam Bukhari

Imam Bukhari (Muhammed Al-Bukhari) (born July 20, 810) Turkistan Sunni Islamic scholar – Sahih Al-Bukhari

Read about Al Bukhari here

Watch a video about the Al Bukhari and his great literary work,
 Sahih Al Bukhari


Petrarch

Petrarch (Francesco Petrarca) (born July 20, 1304) – Italian humanist, poet

Read the Authors Calendar biography of Petrarch

Read one of Petrarch's sonnets here

Pavarotti sings the Petrarch sonnet listed above here

Read a paper about Petrarch and the history of philosophy here

Watch a talk about Petrarch
 here