Births on February 17

Abraham Fraenkel

Born on February 17, 1891

Abraham Fraenkel, German-Israeli mathematician and academic (d. 1965)

Abraham Fraenkel (Hebrew: אברהם הלוי (אדולף) פרנקל; February 17, 1891 – October 15, 1965) was a German-born Israeli mathematician. He was an early Zionist and the first Dean of Mathematics at the Hebrew University of Jerusalem. He is known for his contributions to axiomatic set theory, especially his additions to Ernst Zermelo's axioms, which resulted in the Zermelo–Fraenkel set theory.

References

Abraham Fraenkel

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Events on 1891

10 Mar

Strowger switch
Almon Strowger, an undertaker in Topeka, Kansas, patents the Strowger switch, a device which led to the automation of telephone circuit switching.
15 May

Rerum novarum
Pope Leo XIII defends workers' rights and property rights in the encyclical Rerum novarum, the beginning of modern Catholic social teaching.
20 May

Kinetoscope
History of cinema: The first public display of Thomas Edison's prototype kinetoscope.

Births on February 17

Abraham Fraenkel

Born on February 17, 1891

References

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Events on 1891

Strowger switch

Rerum novarum

Kinetoscope