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Monday, January 10, 2022
3.065 AMICOR (24)
AMICOR 3.065
#Dra. Valderês A. R. Achutti (*13/06/1931+15/06/2021) (Sete meses em 15/01/2022)
Em Moscou (1985) junto ao Kremlin, e o Czar Sino, que nunca soou. (1737) Tsar Bell, Царь–колокол; Tsar'-kolokol, Tsarsky Kolokol, Tsar Kolokol III, or Royal Bell
Mathematicians Clear Hurdle in Quest to Decode Primes
By KEVIN HARTNETT
Paul Nelson has solved the subconvexity problem, bringing mathematicians one step closer to understanding the Riemann hypothesis and the distribution of prime numbers.
Evolution ‘Landscapes’ Predict What’s Next for COVID Virus
By CARRIE ARNOLD
As SARS-CoV-2 mutates, scientists are using topographical maps called “fitness landscapes” to chart the virus’s evolutionary history and predict its future.
Symmetries Reveal Clues About the Holographic Universe
By KATIE McCORMICK
Physicists are using fundamental symmetries to work out the basic rules for a theory of our universe — one independent from the concepts of space and time.
Clocking Memories A new study helps clarify how the brain keeps a record of the timing of events by firing special neurons called “time cells,” as Abdulrahman Olagunju reports for Scientific American. Although scientists have known certain cells time-stamp our memories, they haven’t known how. In 2019 Jordana Cepelewicz wrote for Quanta about one theory: Our brain encodes the information with a mathematical function called a Laplace transform.
Clarified Incompleteness A logic puzzle from Alex Bellos for The Guardian illustrates a simplified proof for Gödel’s incompleteness theorem. While simple logic puzzles can capture its essence, Gödel’s actual proof is much more involved. Natalie Wolchover explained how it works for Quanta in 2020.
Pizza’s dominance on the international gastronomic stage hinges not on a glorious past rooted in antiquity so much as an anthropological phenomenon that has come to be known as the “pizza effect.”
Ji Xianlin Translated from the Chinese by Chenxin Jiang. Introduction by Zha Jianying
Ji Xianlin was a professor of Sanskrit at the prestigious Peking University. An early member of the Chinese Communist Party with a working-class background, he was an ideal citizen in communist China. But in 1966 a student-led coalition, the Red Guards, began to call out the supposed elitism of teachers and intellectuals. Thus started the Cultural Revolution, a time of censorship and extreme discipline in the upper reaches of the academy, but also one when millions of people were imprisoned and starved and countless died.
Refusing to go along with the baseless attacks and internal power squabbles at the university, Ji was labeled a counterrevolutionary and was subjected to a year and a half of torture, and finally a year of detainment and physical labor in appalling conditions. His faith in the Communist Party and all it had stood for was shattered. The Cowshed recounts this excruciating experience in a narrative full of sharp irony, empathy, and remarkable insights into a central event in Chinese history.
“At the center of Ji’s account, ably translated by Chenxin Jiang, is the ‘cowshed’ of the title. . . . Ji’s description of this institution, really a kind of mini concentration camp, is unforgettable.” —Richard Bernstein, The New York Times Book Review
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