"Luminous" is a

science-fiction Science fiction (often shortened to sci-fi or abbreviated SF) is a genre of speculative fiction that deals with imaginative and futuristic concepts. These concepts may include information technology and robotics, biological manipulations, sp ...

short story by

Australian Australian(s) may refer to: Australia * Australia, a country * Australians, citizens of the Commonwealth of Australia ** European Australians ** Anglo-Celtic Australians, Australians descended principally from British colonists ** Aboriginal Aus ...

writer

Greg Egan Greg Egan (born 20 August 1961) is an Australian science fiction writer and mathematician, best known for his works of hard science fiction. Egan has won multiple awards including the John W. Campbell Memorial Award, the Hugo Award, and the Lo ...

, first published in '' Asimov’s Science Fiction'' in September 1995. The short story was included in the collections '' Luminous'' in 1998, '' Dark Integers and Other Stories'' in 2008, and '' The Best of Greg Egan'' in 2020. It was nominated for the

Hugo Award for Best Novelette The Hugo Award for Best Novelette is one of the Hugo Awards given each year for science fiction or fantasy stories published or translated into English during the previous calendar year. The novelette award is available for works of fiction of ...

in 1996. It has a sequel, the short story "

Dark Integers "Dark Integers" is a science-fiction short story by Australian writer Greg Egan, first published in ''Asimov's Science Fiction'' in October/November 2007. The short story was included in the collections '' Dark Integers and Other Stories'' in 200 ...

Plot

Bruno and Alison, who made her

PhD A Doctor of Philosophy (PhD, DPhil; or ) is a terminal degree that usually denotes the highest level of academic achievement in a given discipline and is awarded following a course of graduate study and original research. The name of the deg ...

under the supervision of Yuen Fu-ting at Fu-tan university in

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

, discuss about

arithmetics Arithmetic is an elementary branch of mathematics that deals with numerical operations like addition, subtraction, multiplication, and Division (mathematics), division. In a wider sense, it also includes exponentiation, extraction of nth root, ...

and the relation of mathematical truth to the physical world. Alison insists that there needs to be a manifestation of theorems by either thought or computation, which would imply them being correct only to spread with the

speed of light The speed of light in vacuum, commonly denoted , is a universal physical constant exactly equal to ). It is exact because, by international agreement, a metre is defined as the length of the path travelled by light in vacuum during a time i ...

. She underlines this point of view with a statement about very high

integers An integer is the number zero (0), a positive natural number (1, 2, 3, ...), or the negation of a positive natural number (−1, −2, −3, ...). The negations or additive inverses of the positive natural numbers are referred to as negative in ...

, which after 423 steps implies its opposite and hence yields a contradiction within arithmetics. Luminous, a computer only based on the interaction of light with itself, carries out these 423 steps and then begins to map out an island of theorems belonging to the far side of mathematics. Bruno suspects the anomaly to have formed from certain combinations in the

quark–gluon plasma Quark–gluon plasma (QGP or quark soup) is an interacting localized assembly of quarks and gluons at Thermodynamic equilibrium#Local and global equilibrium, thermal (local kinetic) and (close to) chemical (abundance) equilibrium. The word ''plasm ...

after the

Big Bang The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models based on the Big Bang concept explain a broad range of phenomena, including th ...

. Yuen Ting-fu orders Alison to carry out computations to destroy the far side, when a large spike appears and gets manifested by them gaining an understanding of the arithmetics of the far side. They discuss about the aliens responsible and the possibility, that if their attack indeed only spread with the speed of light, they must exist on Earth in a form invisible to them due to their different mathematics. But their new insight in it might shed light on this new world.

Translation

The short story was translated into German (1996), French (1998), Italian (2001), Japanese (2002) and Spanish (2010).

Reception

Reviews

Writing in ''

Strange Horizons ''Strange Horizons'' is an online magazine, online speculative fiction magazine. It also features speculative poetry and non-fiction in every issue, including reviews, essays, interviews, and roundtables. History and profile It was launched in S ...

'', Karen Burnham discussed

suspension of disbelief Suspension of disbelief is the avoidance—often described as willing—of critical thinking and logic in understanding something that is unreal or impossible in reality, such as something in a work of speculative fiction, in order to believe i ...

in regard to multiple of Egan's short stories. Burnham indicated that "Luminous" and "

" "aren't necessarily Egan's best stories" as they "both rely heavily on their plots, with very little characterization", and "it's very hard to find a narrative toehold when the infodumping gets confusing". However, they found that "reading the introduction" of '' Dark Integers and Other Stories'' makes "them easier to read". She explained, "Then I knew that my feeling of disjointedness wasn't because I was stupid, but because the stories' conceit really was completely without basis in any real-world science or genre convention." Rich Horton, writing on the '' SF Site'', referred to the story's central premise as "fascinating" but stated that "it didn't quite sell this idea, and the thrillerish material wasn't convincingly integrated." In the '' Reactor Magazine'', Salik Shah claimed the short story (together with its sequel "

") "would make an exciting premise for radio or film adaptation."

Awards

"Luminous" was nominated for the

in 1996 and won the

Japanese Japanese may refer to: * Something from or related to Japan, an island country in East Asia * Japanese language, spoken mainly in Japan * Japanese people, the ethnic group that identifies with Japan through ancestry or culture ** Japanese diaspor ...

Seiun Award The is a Japanese speculative fiction award given each year for the best science fiction works and achievements during the previous calendar year. Organized and overseen by , the awards are given at the annual Nihon SF Taikai, Japan Science Fic ...

in 2003. It reached the 12th in the Reader Poll of the

Locus Award The Locus Awards are an annual set of literary awards voted on by readers of the science fiction and fantasy magazine '' Locus'', a monthly magazine based in Oakland, California. The awards are presented at an annual banquet. Originally a poll ...

in 1996.

References