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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.

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Interior dome of Naval Hill planetarium reaches completion
2013-09-04

 

Work on the inside of the dome
Photo: Reinier Brönn
01 September 2013

The interior perforated aluminium planetarium dome has been installed by an American expert from Astro-Tec, the American company that customised the dome for the planetarium on Naval Hill. The planetarium, the first digital planetarium in sub-Saharan Africa, is scheduled to open in November 2013. The UFS manages the project.

The dome arrived in parts by ship from the USA in June 2013. These parts consisted of a number of long curved ‘ribs’ and numerous perforated panels. The panels were attached in sections to the ribs to form a smooth concave shell, creating the surface for the projection system.

The next step will be the installation of the projection system itself.

The 86-year old Lamont-Hussey Observatory on Naval Hill, also known as the Sterrewag Theatre, is home to the planetarium. The planetarium is the first component of a proposed Centre for Earth and Space. This will be a multi-purpose facility to promote science communication and preservation, and the arts.

This project is a long-term partnership between three main organisations, each bringing essential components to the project: the Mangaung Metro Municipality (MMM) as the land-owner, the Free State Department of Economic Development, Tourism and Environmental Affairs (DETEA) and the UFS, which developed the concept for the planetarium project and will be responsible for its operation and further fundraising endeavours.

The National Department of Science and Technology also joined this venture subsequent to providing substantial funding to the UFS in order to purchase the projection system for the planetarium.

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