Isaak Bacharach

Isaak Bacharach (born December 2, 1854 in Seligenstadt ; died September 22, 1942 in the Theresienstadt ghetto ) was a German mathematician and victim of the Holocaust . According to him, and Arthur Cayley is set of Cayley-Bacharach named.

Life

Isaak Bacharach was probably born as the son of Samuel and Friederike Bacharach in Seligenstadt. Isaak Bacharach attended elementary school in Seligenstadt for four years, the Israelite Teaching and Education Institute in Pfungstadt for four years , the Progymnasium in Seligenstadt for one year and the humanistic grammar school in Darmstadt for three years . In the fall of 1873 he began studying at the Darmstadt Polytechnic . A year later he moved to the University of Leipzig for one year and to the University of Munich and the Munich Polytechnic for another year . There were Felix Klein and Alexander von Brill his teachers. In 1877 he passed the teaching examination and worked from November 12, 1877 to October 16, 1878 as an assistant at the Würzburg district secondary school. On October 16, 1878 Isaac Bacharach "Lehramtsverweser" was and on 16 December 1879 as the science teacher for mathematics and physics at the Royal Bavarian school in Erlangen hired.

Isaak Bacharach continued his studies at the University of Erlangen and published between 1878 and 1880, among other things, on surfaces of rotation and third-order surfaces . In his further scientific work, Bacharach dealt with Cayley's intersection theorem and developed it decisively further, so that science subsequently spoke of the Cayley-Bacharach theorem . He received his doctorate on this in 1881 under Max Noether with a treatise on intersection systems of algebraic curves (title of the dissertation: About intersection systems of algebraic curves ). The aim of the dissertation was to strictly justify and supplement Cayley's work based on the results of Noether (fundamental theorem).

Isaak Bacharach was married to Pauline Rosenthal (born November 10, 1860 in Fürth ). In Erlangen , daughter Maria was born on September 20, 1885 and son Emil on September 19, 1887.

In 1896 Bacharach was appointed to the Royal Industrial School in Nuremberg , where he was given the new professorship for mathematics and physics. The family moved from Erlangen to Nuremberg on November 24, 1896 . From November 1909 to March 1939 Isaak Bacharach lived as a tenant on the first floor of the property at Friedrichstrasse 66 for almost thirty years. In addition to his teaching post, he held the post of curator for the physical collections and on October 1, 1910 became the first Jewish deputy head of the Königlich Appointed Bavarian Technical Center Nuremberg .

On January 6, 1917, Isaak Bacharach was awarded the Order of Merit of St. Michael IV Class by the Kingdom of Bavaria with the crown , and on November 18, 1917 both the King Ludwig Cross and the Luitpold Cross for 40 years of service in state and community services .

On February 1, 1920 Isaak Bacharach was retired at his own request at the age of 66 "with recognition of his excellent service" .

His wife Pauline died on November 17, 1931 in Nuremberg.

On March 30, 1939, Isaak Bacharach was asked to leave his apartment at Friedrichstrasse 66 and move to the " Judenhaus " at Bucher Strasse 17. His son Emil was removed from his service as district judge by the National Socialists and deported together with his wife Dora on November 29, 1941 to the Jungfernhof camp near Riga ; both are considered lost. However, the couple previously managed to get their son and daughter to safety abroad. After his son and daughter-in-law had been deported , Isaak Bacharach was housed on December 21, 1941 in the Jewish nurses' home on Wielandstrasse 6. His daughter Maria died on January 17, 1942 in Nuremberg.

At the age of 87, Isaak Bacharach was deported on September 10, 1942 with Transport II / 25 from Nuremberg to the Theresienstadt ghetto. In his registration card for the city of Nuremberg it was noted: "moved to the protectorate ". He was pronounced dead twelve days later. In the death notice issued by the Theresienstadt ghetto, the cause of death was noted as “ enteritis, intestinal catarrh ”. With the transport II / 25 from Nuremberg to Theresienstadt 1000, mostly elderly people were deported, of whom only 51 survived the Holocaust.

Fonts

• About the Cayley's intersection theorem , Mathematische Annalen , Volume 26, 1886, pp. 275–299, digitized, SUB Göttingen (elaboration of his dissertation)

Web links

• podcast.de: Hörstolperstein Dr. Isaak Bacharach - Nuremberg

Individual evidence

1. ↑ David Eisenbud , Mark Green , Joe Harris : Cayley-Bacharach theorems and conjectures, Bulletin AMS, Volume 33, 1996, pp. 295-324, online
2. ^ S. Finsterwalder: Alexander von Brill, Mathematische Annalen, Volume 112, 1936, p. 658
3. ↑ Isaak Bacharach in the Mathematics Genealogy Project (English)
4. ↑ Alexander von Brill: Max Noether , Annual Report DMV, Volume 32, 1923, p. 227
5. ↑ op-online.de : Scientist Isaak Bacharach - Life ends after 87 years in a concentration camp , accessed on July 28, 2015
6. ↑ Susanne Rieger and Gerhard Jochem, rijo research project (Nuremberg City Archives): Dr. Isaak Bacharach, Vice President of the Nuremberg Technical Center (Georg Simon Ohm University) (PDF), accessed on July 28, 2015
7. ↑ holocaust.cz: Transport II / 25, č. 16 (09/11/1942 Nuremberg -> Theresienstadt) - Dr. Isaak Bacharach  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. , accessed July 28, 2015  
8. ↑ holocaust.cz: Bacharach Isaak: Obituary Report, Ghetto Theresienstadt ( Memento of the original from March 5, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , accessed July 28, 2015