The discussion centers on a set of electromagnetism formulas involving infinitesimals, specifically questioning their correctness and derivation. Participants express concerns that three of the formulas incorrectly feature infinitesimals on one side only, while others argue that all terms are indeed infinitesimal. The original text, attributed to a Bulgarian author, is described as lacking clarity and context, leading to confusion among readers. Forum members suggest that the source material is inadequate and recommend seeking a better textbook for a clearer understanding of the concepts. The conversation emphasizes the importance of proper references and foundational knowledge in physics and mathematics.