# A report on Stanislaw Ulam

Polish-American scientist in the fields of mathematics and nuclear physics.

- Stanislaw Ulam56 related topics with Alpha

## Ulam's packing conjecture

0 linksUlam's packing conjecture, named for Stanislaw Ulam, is a conjecture about the highest possible packing density of identical convex solids in three-dimensional Euclidean space.

## Lucky number

0 linksNatural number in a set which is generated by a certain "sieve".

Natural number in a set which is generated by a certain "sieve".

The term was introduced in 1956 in a paper by Gardiner, Lazarus, Metropolis and Ulam.

## Reconstruction conjecture

0 linksInformally, the reconstruction conjecture in graph theory says that graphs are determined uniquely by their subgraphs.

Informally, the reconstruction conjecture in graph theory says that graphs are determined uniquely by their subgraphs.

It is due to Kelly and Ulam.

## Measurable cardinal

0 linksCertain kind of large cardinal number.

Certain kind of large cardinal number.

The concept of a measurable cardinal was introduced by Stanislaw Ulam in 1930.

## Critical mass

1 linksSmallest amount of fissile material needed for a sustained nuclear chain reaction.

Smallest amount of fissile material needed for a sustained nuclear chain reaction.

This latter problem provided significant motivation for the development of the Monte Carlo method in computational physics by Nicholas Metropolis and Stanislaw Ulam.

## Kremlinology

1 linksStudy and analysis of the politics and policies of the Soviet Union while Sovietology is the study of politics and policies of both the Soviet Union and former communist states more generally.

Study and analysis of the politics and policies of the Soviet Union while Sovietology is the study of politics and policies of both the Soviet Union and former communist states more generally.

Adam Ulam, brother of Stanisław Ulam and head of the Russian Research Center at Harvard University

## Santa Fe, New Mexico

1 linksCapital of the U.S. state of New Mexico.

Capital of the U.S. state of New Mexico.

Stanislaw Ulam (1909–1984), mathematician associated with the Manhattan Project

## Equipartition theorem

1 linksIn classical statistical mechanics, the equipartition theorem relates the temperature of a system to its average energies.

In classical statistical mechanics, the equipartition theorem relates the temperature of a system to its average energies.

In 1953, Fermi, Pasta, Ulam and Tsingou conducted computer simulations of a vibrating string that included a non-linear term (quadratic in one test, cubic in another, and a piecewise linear approximation to a cubic in a third).

## Hyers–Ulam–Rassias stability

0 linksThe stability problem of functional equations originated from a question of Stanisław Ulam, posed in 1940, concerning the stability of group homomorphisms.

## George David Birkhoff

0 linksAmerican mathematician best known for what is now called the ergodic theorem.

American mathematician best known for what is now called the ergodic theorem.

However, Birkhoff took a particular liking to certain Jewish mathematicians, including Stanislaw Ulam.