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30 November 2021 | Story Leonie Bolleurs | Photo Supplied
Prof Johan Meyer, Senior Professor in the Department of Mathematics and Applied Mathematics, says he is looking forward to learning from others in the field during this collaboration.

What do trees, black holes, earthquakes, and time structures have in common? 

The answer to this question is that these, in one way or the other, form the focus of some of the abstracts delivered during the Annual Congress of the South African Mathematical Society. The society has as its main objective the advancement of mathematics in South Africa. 

The Department of Mathematics and Applied Mathematics at the University of the Free State (UFS), in conjunction with the South African Mathematical Society (SAMS 2021), is hosting the 64th Annual Congress of the society this week (29 November to 1 December 2021).

Prof Johan Meyer, Senior Professor in the department, says the congress, which is being conducted online, is focusing on all aspects of mathematics research, including history and teaching.

Learning from others in the field

The congress, which aims to share the latest research results in mathematics, will be attended by staff and students from universities across South Africa as well as abroad. “Anyone from the public is, of course, welcome to attend or even share their results if they are also involved in mathematics research,” adds Prof Meyer. 

He says that he is looking forward to learning from others in the field during this collaboration. 

The congress will include discussions on more than 120 abstracts, covering category theory, algebra, topology, logic; functional analysis and operator theory; finite groups and combinatorial structures; graph theory and combinatorics; lie symmetries and nonlinear differential equations; and applied and numerical mathematics.

Array of interesting topics presented

“It is important in many areas of science and engineering to predict and to simulate rare, random events, the occurrence of which may have negative or even catastrophic consequences. Examples include internet server overflows, mechanical breakdowns, floods, and financial crashes. Rare events can also have a positive effect, triggering for example chemical reactions or driving genetic evolution via random mutations.” Prof Hugo Touchette from Stellenbosch University will be shedding some light on this interesting topic in his presentation on Predicting and simulating rare events.

Prof Jeandrew Brink, Associate Professor in the Department of Mathematics and Applied Mathematics at the UFS, is presenting a plenary session on the topic Determining the geometry of strong field space-times in spite of tacitly assuming the answer during every measurement. In South Africa, state-of-the art pulsar timing data from the MeerKAT telescope will make a considerable contribution to conducting GR orbital tests. Prof Brink comments on how pulsar timing tests differ from tests using gravitational wave detectors, as well as what we can learn from the framework already employed to perform pulsar timing measurements.

News Archive

Study shows that even cheating monkeys alter their behaviour to avoid detection and punishment
2013-03-12

 

Dr Le Roux sharing a moment with the geladas (Theropithecus gelada).
Photo: Supplied
11 March 2013

A recent article headed by Dr Aliza le Roux from the University of the Free State Qwaqwa Campus’ Department of Zoology and Entomology, asserts that cheating and deception is not only a human phenomenon - it is also found in non-human animals.

“Our specific study investigated cheating and punishment in geladas. While human beings are known to deceive one another, and punish cheaters that get caught, it is actually very rare to find proof of this kind of behaviour in non-human animals,” said Dr Le Roux.

“We don't know if this is because humans are uniquely deceitful, or if it is just that animals deal with cheating differently. Our study was therefore the first to demonstrate that gelada males and females try to deceive their partners when they are cheating on them. This means they try to hide their unfaithful behaviour.” This is therefore the first investigation to document tactical deception in primates living in a natural environment.

“We also showed that the cuckolded males then punish the cheaters, but could not determine if the punishment actually caused cheaters to stop cheating,” said Dr Le Roux.

This on-going and long-term study continues to observe the population of wild geladas in the Simien Mountains National Park in Ethiopia. The study investigates primate hormones, cognition, genetics, social behaviour and conservation, and is done in collaboration with the Universities of Michigan and Pennsylvania.

The full version of the article can be accessed on (http://www.nature.com/ncomms/journal/v4/n2/full/ncomms2468.html).


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