Ulam, a traditional salad produced from the leaves of Centella asiatica, is typically eaten with anchovies, cincalok or shrimp paste. It is recognised as a popular main dish in traditional Malay villages.

Using the Borsuk-Ulam theorem :
On the Hyers-Ulam Stability of Linear Mappings
Hyers-Ulam stability of functional equations in several variables
Fuzzy versions of Hyers--Ulam--Rassias theorem
The Fermi-Pasta-Ulam problem: Paradox turns discovery ☆
Fermi-Pasta-Ulam problem revisited with a Bose-Einstein condensate
Hyers-Ulam-Rassias Stability of Functional Equations in Mathematical Analysis
The Problem of S. M. Ulam for Approximately Multiplicative Mappings
A Generalization of the Hyers-Ulam-Rassias Stability of Approximately Additive Mappings
On the Stability of Functional Equations and a Problem of Ulam