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TIME AND SPACE
Researchers found mathematical structure that was thought not to exist
by Staff Writers
Espoo, Finland (SPX) Nov 16, 2016


File image.

In the 1970s, a group of mathematicians started developing a theory according to which codes could be presented at a level one step higher than the sequences formed by zeros and ones: mathematical subspaces named q-analogs.

For a long time, no applications were found - or were not even searched for - for the theory until ten years ago, when it was understood that they would be useful in the efficient data transmission required by modern data networks.

The challenge was that, despite numerous attempts, the best possible codes described in the theory had not been found and it was therefore believed they did not even exist. However, an international research group disagreed. 'We thought it could very well be possible,' says Professor Patric Ostergard from Aalto University and smiles.

'The search was challenging because of the enormous size of the structures. Searching for them is a gigantic operation even if there is very high-level computational capacity available. Therefore, in addition to algebraic techniques and computers, we also had to use our experience and guess where to start looking, and that way limit the scope of the search.'

The perseverance was rewarded when the group consisting of five researchers found the largest possible structure described by the theory. The results were recently presented in the scientific publication Forum of Mathematics, Pi, which publishes only a dozen carefully selected articles per year.

Aalto University (Finland), Technion (Israel), University of Bayreuth (Germany), Darmstadt University of Applied Sciences (Germany), University of California San Diego (USA) and Nanyang Technological University (Singapore) participated in the study.

Although mathematical breakthroughs rarely become financial success stories immediately, many modern things we take for granted would not exist without them. For example, Boolean algebra, which has played a key role in the creation of computers, has been developed since the 19th century.

'As a matter of fact, information theory was green before anyone had even mentioned green alternatives,' says Ostergard and laughs.

'Its basic idea is, actually, to try to take advantage of the power of the transmitter as effectively as possible, which in practice means attempting to transmit data using as little energy as possible. Our discovery will not become a product straight away, but it may gradually become part of the internet.''

Research paper: "Existence of q-analogs of Steiner Systems".


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