Quantum calculus (q-calculus) is sometimes called 'calculus without limits' because it develops derivatives, integrals, and analogous results without using the notion of limits, in contrast to traditional infinitesimal calculus.
Sources
- Quantum calculus (en.wikipedia.org)
- https://mathworld.wolfram.com/q-Calculus.html (mathworld.wolfram.com)
- https://arxiv.org/pdf/1306.1327 (arxiv.org)
- https://link.springer.com/book/10.1007/978-1-4613-0071-7 (link.springer.com)
- https://arxiv.org/pdf/1405.2996 (arxiv.org)
- https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2020.00043/full (frontiersin.org)
- https://iopscience.iop.org/article/10.1088/1742-6596/1411/1/012002/pdf (iopscience.iop.org)