Greg Egan's Home Page

The page "Science Notes / Steffen’s Polyhedron" has been updated

The page "Science Notes / Planes, Spheres and Pseudospheres" has been updated

The page "Bibliography" has been updated

The page "Science Notes / Ellipsoid Gravity" has been updated

The page "Bibliography" has been updated

The page "Bibliography" has been updated

The page "Works Online" has been updated

The page "Science Notes / Borehole Oscillator" has been updated

The page "Bibliography" has been updated

The page "Science Notes / Pick Two Points" has been updated

The page "Bibliography" has been updated

The page "Science Notes / Pick Two Points" has been updated

The page "Bibliography" has been updated

The page "Science Notes / Reptends and Reciprocals" has been updated

A Spanish translation of my story THE DISCRETE CHARM OF THE TURING MACHINE

The page "Bibliography" has been updated

The page "Science Notes / Planes, Spheres and Pseudospheres" has been updated

The page "Science Notes / The Finite Fall" has been updated

My new story, "Vouch For Me", has just been published in the July/August 2024 issue of Analog magazine.

My new novel, MORPHOTROPHIC, is now available.

My new novel, MORPHOTROPHIC, can now be preordered.

Read an excerpt from my new novel, MORPHOTROPHIC

My new story "Death and the Gorgon" has just been published in Asimov's SF Magazine

My story DIDICOSM, about the shape of the universe, is now free to read online.

Read about the strange geometry behind my new story DIDICOSM.

How many different ways can you move along an orbit from point A to point B and arrive at a specified time?

My new story NIGHT RUNNING has just been published in Asimov's Science Fiction, in the March/April 2023 issue.

When electronics importer Cara Leon goes missing, private investigator Sam Mujrif is hired by her sister to investigate.

Read about the Mermin-Peres Magic Square Game

How can you find one fake coin among many, by comparing the weights of various sets of coins, using the smallest number of comparisons?

The page "Science Notes / Black Hole Passing" has been updated

My new story "Dream Factory" is online at Clarkesworld.

The page "Science Notes / Peeling the Octonions" has been updated

The page "Science Notes / Average Shadows" has been updated

The page "Science Notes / Average Shadows" has been updated

The page "Science Notes / Symmetries and the 24-cell" has been updated

Why is the Laplace-Runge-Lenz vector conserved?

The page "Science Notes / Constant Gravity Rollercoasters" has been updated

The page "The Book of All Skies / Gravity in Multiply Connected Space" has been updated

My new novel, The Book of All Skies, is now available.

The page "Applets Gallery / deBruijn" has been updated

What are the ways that objects undergoing relativistic motion can maintain constant distances from each other?

My new story "You and Whose Army?"

My 1985 story "Tangled Up" is now available to read on my web site.

The page "Science Notes / The Tell-Tale Board" has been updated

The page "Bibliography" has been updated

The page "Bibliography" has been updated

The page "Bibliography" has been updated

The page "Works Online" has been updated

The page "Miscellaneous Fiction / Crystal Nights" has been updated