J. Barkley Rosser

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The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)

New Seven Wonders of the World

Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.

5 Remarkably Close U.S. Presidential Elections

American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.

What’s the Difference Between Bison and Buffalo?

Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)

7 of the World’s Deadliest Shipwrecks

United States electoral college map showing number of electoral votes by state.

How Does the Electoral College Work?

Snowshoe hare (Lepus americanus) with its Summer coat on the left side and its winter coat on the right.

7 Animals That Turn White in Winter

Close-up of tobacco plants in Ontario, Canada. Tobacco, Nicotiana, cured leaves used after processing in various ways for smoking, snuffing, chewing, and extracting of nicotine.

7 of the World’s Deadliest Plants

J. Barkley Rosser

American mathematician

Learn about this topic in these articles:

Gödel’s incompleteness theorem

In metalogic: The two incompleteness theorems
The American mathematician J. Barkley Rosser, who also contributed to number theory and applied mathematics, weakened the hypothesis to mere consistency in 1936, at the expense of complicating somewhat the initial sentence (2).
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