Editor's Note] The International Congress of Mathematicians (ICM) will be held in Philadelphia, USA, from July 23-30, 2026.

IT is well known that the eggs of sharks and rays, when deposited, are enclosed in a strong horny capsule or “purse “formed as a secretion from the oviduct. In both groups these curious appendages ...

We’ve all been there. It’s 1:30 PM, the sun is hitting the classroom windows just right, and half of your middle schoolers are staring into space like they’ve been hypnotized. The "afternoon slump" is ...

Abstract: Signatures detect changes to data objects. Numerous schemes are in use, especially the cryptographically secure standards SHA-1. We propose a novel signature scheme which we call algebraic ...

Abstract: We present an algebraic approach to fuzzy generalisation of rough sets. We take an arbitrary residuated lattice L as a basic algebraic structure. The L-fuzzy rough sets are defined using the ...

This repository provides about 55 Jupyter notebooks (March 2026) with the implementation of basic algorithms and data structures. You can play around with the code in many ways. The intention is to ...

The Radio Regulations contains the complete texts as adopted by the World Radiocommunication Conference (Geneva, 1995) (WRC-95) and subsequently revised and adopted by World Radiocommunication ...