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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

New digital planetarium first of its kind for Sub-Saharan Africa
2013-10-10

Mr Andrew Johnson, Sky-Skan engineer, explains how the dataprojector of the new digital planetarium functions.
10 October 2013

The University of the Free State (UFS) is the first in the world to boast a modern digital planetarium which was erected within an existing observatory.

It is also the first planetarium of its kind for Sub-Saharan Africa.

“What makes the project unique is the fact that we convert the existing observatory structure into a modern digital planetarium. It hasn’t been done anywhere else,” says Andrew Johnson, engineer at Sky-Skan, the company supplying the equipment and also installing it.

Andrew has worked on similar projects, with his company installing digital planetariums around the world.

What makes the planetarium so special is the fact that it offers visitors an inclusive experience.

“Previously visitors could only watch projected stars and constellations, but with the digital planetarium they can now experience a journey through space which feels very close to reality.”

Andrew points out that, apart from stargazing and travelling through space, the digital planetarium allows the audience to visit planets, explore the secrets of the oceans or even organs in the human body.

The planetarium will also be used for concerts, state-of-the-art presentations, theatre productions, as well as meetings, conferences and exhibitions.

The auditorium can seat approximately 90 adults or 120 children.

The digital dome that was recently fitted into the existing observatory structure, is a 12-metre seamless aluminium screen complemented by a powerful surround-sound system and multiple data projectors from Sky-Skan. This results in an immersive experience of the digital universe, as well as the recreation of the macro and micro cosmos an a variety of other environments.

The planetarium will be officially opened on Friday 1 November 2013 by Derek Hanekom, Minister of Science and Technology. Prof Matie Hoffman from the Department of Physics at the UFS is delighted at this visit from Minister Hanekom.

“This recognition and national interest demonstrates the importance and contribution of the first digital planetarium in Sub-Saharan Africa to science and astronomy.  It is also evidence that a facility like this is important for the training of the next generation of scientists.”

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