The International Day of Mathematics, observed on 14 March annually, celebrates the essential role of mathematics in advancing knowledge, innovation, and sustainable development worldwide. This year, the theme “Mathematics and Hope” highlights how mathematical thinking provides structure and clarity in addressing complex global challenges.

In a rapidly changing world marked by uncertainty and risks, mathematics offers more than technical solutions; it provides a foundation for evidence-based dialogue and forward-looking policies. By fostering robust inquiry, collaboration, and interdisciplinary research, the mathematical sciences contribute to building more equitable, sustainable, and resilient societies.

In support of International Day of Mathematics 2026, MDPI journals aim to promote research that demonstrates how mathematical approaches drive innovation across disciplines. Through Special Issues and scholarly publications, MDPI provides platforms for researchers to explore the role of mathematics in advancing science, technology, and societal well-being, reinforcing its enduring contribution to a hopeful and sustainable future.

“A Discrete Schwarzian Derivative via Circle Packing”
by Kenneth Stephenson
Geometry 2025, 2(4), 16; https://doi.org/10.3390/geometry2040016

“The Classical Origin of Spin: Vectors Versus Bivectors”
by Bryan Sanctuary
Axioms 2025, 14(9), 668; https://doi.org/10.3390/axioms14090668

”Hausdorff Outer Measures and the Representation of Coherent Upper Conditional Previsions by the Countably Additive Möbius Transform”
by Serena Doria
Fractal Fract. 2025, 9(8), 496; https://doi.org/10.3390/fractalfract9080496

“Spaces of Polynomials as Grassmanians for Immersions and Embeddings”
by Gabrial Katz
Int. J. Topol. 2025, 2(3), 9; https://doi.org/10.3390/ijt2030009

“New Exploration of Phase Portrait Classification of Quadratic Polynomial Differential Systems Based on Invariant Theory”
by Joan Carles Artés, Laurent Cairó and Jaume Llibre
AppliedMath 2025, 5(2), 68; https://doi.org/10.3390/appliedmath5020068

“An Analysis of Vectorised Automatic Differentiation for Statistical Applications”
by Chun Fung Kwok, Dan Zhu and Liana Jacobi
Stats 2025, 8(2), 40; https://doi.org/10.3390/stats8020040

“Improved Confidence Intervals for Expectiles”
by Spiridon Penev and Yoshihiko Maesono
Mathematics 2025, 13(3), 510; https://doi.org/10.3390/math13030510

“Three-Dimensional Lorentz-Invariant Velocities”
by James M. Hill
Symmetry 2024, 16(9), 1133; https://doi.org/10.3390/sym16091133

“Periodic Solutions in a Simple Delay Differential Equation”
by Anatoli Ivanov and Sergiy Shelyag
Math. Comput. Appl. 2024, 29(3), 36; https://doi.org/10.3390/mca29030036

”Computational Modelling and Simulation of Scaffolds for Bone Tissue Engineering”
by Haja-Sherief N. Musthafa, Jason Walker and Mariusz Domagala
Computation 2024, 12(4), 74; https://doi.org/10.3390/computation12040074

“Recent Developments in Numerical Methods for Partial Differential Equations” Guest Editor:  Prof. Dr. Olivier Pironneau Manuscript submission deadline: 31 May 2026	“Fractional Mathematical Modelling: Theory, Methods, and Applications—2nd Edition” Guest Editors: Dr. Zeeshan Ali and Prof. Dr. Sandra Pinelas Manuscript submission deadline: 16 June 2026
“Applications of Special Functions in Complex Analysis and Their Symmetries” Guest Editors: Prof. Dr. Valer-Daniel Breaz and Dr. Kadhavoor Ragavan Karthikeyan Manuscript submission deadline: 30 June 2026	“On Invariances Across Logics“ Guest Editors: Prof. Dr. Sujata Ghosh and Prof. Dr. Fengrong Liu Manuscript submission deadline: 31 August 2026

The 11th International Conference on Time Series and Forecasting Location: Canaria, Spain Volume Editors: Olga Valenzuela, Fernando Rojas, Luis Javier Herrera, Hector Pomares and Ignacio Rojas Highlights: Benchmarking Foundation Models for Time-Series Forecasting: Zero-Shot, Few-Shot, and Full-Shot Evaluations by Frédéric Montet, Benjamin Pasquier and Beat Wolf Multivariate Forecasting Evaluation: Nixtla-TimeGPT by S M Ahasanul Karim, Bahram Zarrin and Niels Buus Lassen Click here to read the full list of papers.