Portal:Judaism

Georg Cantor was a German mathematician. He is best known as the creator of set theory, which has become a foundational theory in mathematics. Cantor established the importance of one-to-one correspondence between sets, defined infinite and well-ordered sets, and proved that the real numbers are "more numerous" than the natural numbers. In fact, Cantor's theorem implies the existence of an "infinity of infinities". He defined the cardinal and ordinal numbers, and their arithmetic. Cantor's work is of great philosophical interest, a fact of which he was well aware. Cantor's theory of transfinite numbers was originally regarded as so counter-intuitive—even shocking—that it encountered resistance from mathematical contemporaries such as Leopold Kronecker and Henri Poincaré and later from Hermann Weyl and L.E.J. Brouwer, while Ludwig Wittgenstein raised philosophical objections. Christian theologians (particularly Neo-Thomists) saw Cantor's work as a challenge to the uniqueness of the absolute infinity in the nature of God, on one occasion equating the theory of transfinite numbers with pantheism. Cantor's recurring bouts of depression from 1884 to the end of his life were once blamed on the hostile attitude of many of his contemporaries, but these bouts can now be seen as probable manifestations of a bipolar disorder. (Read more...)

Did you know...

• ... that the Monument to the Ghetto Heroes (pictured), site of Willy Brandt's Warschauer Kniefall in 1970, was made from labradorite intended to be used in monuments in Nazi Germany?
• ... that the Chaim Potok novel The Book of Lights is based on Potok's exposure to non-Jewish religions as a military chaplain in Korea and Japan?
• ... that Polish Jewish resistance fighter Vladka Meed was a central source of the 2001 television movie Uprising?
• ... that most Russian-speakers in the United States are Jewish immigrants from the former Soviet Union?

Bethlehem is a Palestinian city located in the West Bank, neighboring Jerusalem, with a population of 25,000 people. The capital of the Bethlehem Governorate of Palestinian Authority, its economy is primarily tourist-driven.

Bethlehem, which may be the same as the Biblical Ephrath, is first mentioned in the Tanakh as the place where the matriarch Rachel died, and her tomb stands at the entrance to Bethlehem. The valley to the east is where Ruth gleaned the fields and returned to town with Naomi. It was the home of Jesse, father of King David of Israel, and the site of David's anointment by the prophet Samuel. It was from the well of Bethlehem that they brought him water when he was hiding in the cave of Adullam.

Between 132 and 135 the city was reoccupied by the Romans after its capture during the Bar Kokhba revolt. Its Jewish residents were expelled by Hadrian. Bethlehem was sacked by the Samaritans in 529, but rebuilt by the Byzantine emperor Justinian I. It was conquered by the Arab Caliphate of 'Umar ibn al-Khattāb in 637. In 1099, Crusaders captured Bethlehem and replaced its Greek Orthodox clergy with a Latin one. This was expelled after the city was captured by Saladin. With the coming of the Mamluks in 1250, the city's walls were demolished, and were subsequently rebuilt during the rule of the Ottoman Empire. The British wrested control of the city from the Ottomans during World War I and it was to be included in an international zone under the 1947 Partition Plan. The city was annexed by Jordan in 1948, and occupied by Israel in 1967. Since 1995, Bethlehem has been governed by the Palestinian National Authority. (Read more...)

• Rabbi Jonathan Sacks, former Chief Rabbi of the Commonwealth and member of the House of Lords, dies (7 November 2020)
• The Pittsburgher Rebbe, Mordechai Yissachar Ber Leifer dies of COVID-19
• A peace agreement is reached between Israel and the UAE (13 August 2020)
• Rabbi Adin Steinsaltz dies, editor of the Steinsaltz Talmud (7 August 2020)

• Contribute to this portal, especially the News section.
• Announce new articles related to Judaism.
• Explore, edit, and improve articles in Category:Judaism.
• Join WikiProject Judaism or WikiProject Israel.
• Explore and help out Portal:Israel and Portal:Kabbalah.