CNTA meaning in Regional ?

Answer: What is Canadian Number Theory Association mean?

The Ribenboim Prize, named in honour of Paulo Ribenboim, is awarded by the Canadian Number Theory Association for distinguished research in number theory by a mathematician who is Canadian or has close connections to Canadian mathematics. Normally the winner will have received their Ph.D. in the last 12 years. The winner is expected to give a plenary talk at the award ceremony.

reference

Full Form	Category
Certified National Threat Analyst	Business
China National Tourism Administration	Community
Central Nova Tourist Association	Community
Citizens for Nuclear Technology Awareness	Computing
Comptoir national technique agricole	General
Consultative Network for Technical Assistance	General
Center for National Threat Assessment	General
Central Nevada Test Area	General
Campionatul National de Time Attack	General
Canadian Number Theory Association	Regional