From Wikipedia, the free encyclopedia
Un problema significa una qüestió, dificultat, a resoldre, a aclarir.[1] Té una significació específica en diverses ciències:
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.