Acta Mathematica is a peer-reviewed open-access scientific journal covering research in all fields of mathematics.

Since 2017, Acta Mathematica has been published electronically and in print by International Press.

The journal's "most famous episode" (according to Villani[1]) concerns Henri Poincaré, who won a prize offered in 1887 by Oscar II of Sweden for the best mathematical work concerning the stability of the Solar System by purporting to prove the stability of a special case of the three-body problem.

This episode was rediscovered in the 1990s by Daniel Goroff, in his preface to the English translation of "Les méthodes nouvelles de la mécanique céleste"[4] by June Barrow-Green and K.G.

He paid more than the prize money to destroy the print run and reprint the issue without his paper, and instead published a corrected paper a year later in the same journal that demonstrated that the system could be unstable.