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Generalidades de las soluciones a las ecuaciones de Einstein en presecia de una densidad del vacio que decae monotonamente con el parametro de Hubble en un espacio-tiempo plano
Generalidades de las soluciones a las ecuaciones de Einstein en presecia de una densidad del vacio que decae monotonamente con el parametro de Hubble en un espacio-tiempo plano
En este trabajo se estudia el comportamiento general del parametro de Hubble para un universo plano que alberga un gas ideal con presion positiva o nula junto con una densidad del vacio compuesta por un termino de costante cosmologica y un termino proporcional a una potencia positiva del parametro de Hubble. Al final se hace el paralelo entre un universo en expansion y el fenomeno de colapso gravitacional esfericamente simetrico. Obtenemos como conclusion que algunas dependencias de la densidad del vacio que crecen mas rapido que H2 inpiden la existencia de singularidades en procesos netamente gravitacionales.
leonardo duarte
Bayes' Theorem in Baseball
Bayes' Theorem in Baseball
A basic understanding on Bayes' theorem and how to apply it to baseball statistics.
Christopher Amici
Ultrasonic Positioning System
Ultrasonic Positioning System
An indoor positioning system relying on time difference of arrival measurements of ultrasonic pings from fixed transmitters. Code available at https://github.com/YingVictor/ultrasonic-positioning
Michael Danielczuk, Andrew Kim, Monica Lu, and Victor Ying
Homework 3
Homework 3
MATH 108 - Introduction to Formal Mathematics
Brennan Gilmore
Grunnur II - Hlutapróf 1
Grunnur II - Hlutapróf 1
þetta er prufa
Hildur Þórsdóttir
Markowitz Portfolio Optimization Theory and Application
Markowitz Portfolio Optimization Theory and Application
Suppose you have a data matrix comprised of several stock options over a set period of time. How do you choose the optimal collection of stocks such that you maximize your returns for a given level of risk? What Markowitz found was an elegant equation. What we realized rather quickly is there does not exist a closed form solution to this problem. Instead we use the tried and tested linear approximation. By transforming this problem into Matrix multiplication, we are able to quickly and (with desired accuracy) approximate the optimal solution, using only linear algebra.
ymxu
IEOR 6613 - Optimization
IEOR 6613 - Optimization
Homework for IEOR 6613
Sahil Bhatia
Congruences
Congruences
Fast exponentiation
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