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Rajiv Sethi is a Professor of Economics at Barnard College, Columbia University and an External Professor at the Santa Fe Institute. He was a 2020-21 Joy Foundation Fellow at the Harvard Radcliffe ...

Visit our Data & Figures, Earth Institute and CSAS.org Websites. Sign up for my occasional Communications here. Recent Communications November 7, 2025: A Climate Talk in Helsinki September 16, 2025: ...

In French, when speaking in the past tense, one must constantly choose between the imparfait and the passé composé (cf. part I). In this exercise we will focus on cases where both tenses are used in a ...

My research in Optimization involves developing efficient 1st and 2nd order optimization algorithms for minimizing loss functions in Machine Learning and Deep Learning frameworks: ...

The primary effect of the Aral Sea desiccation has been the significant loss of water in the sea. The water level has dropped approximately 23 meters since the onset of its primary sources of water ...

Whether the war by means of which the rulers of Spain and our countrymen have brought and are attempting to bring under their domination the barbarian inhabitants, commonly known as Indians, of the ...

Contact Information Donald Goldfarb Alexander and Hermine Avanessians Professor of Industrial Engineering and Operations Research Department of Industrial Engineering and Operations Research Columbia ...

olumbia University was founded in 1754 as King’s College by royal charter of King George II of England. It is the oldest institution of higher learning in the state of New York and the fifth oldest in ...

The linear function is popular in economics. It is attractive because it is simple and easy to handle mathematically. It has many important applications. Linear functions are those whose graph is a ...

This figure is available also in PDF. Data source: 1965-2023 Energy Institute 2024 Statistical Reviw of World Energy, 1900-1965 assumed proportional to CO2 emissions for coal, oil and gas, and a ...

LH Thomas and WJ Eckert in Watson Lab; Photo: [37] ...