🌐EnglishEnglishDeutschEspañolFrançaisTürkçe中文日本語EntityQ5567394· pop 5· linked from 182 articlesGleason's theoremtheorem giving a justification of the Born rule in quantum mechanicsConnectionsquantum mechanicsEntitydensity matrixEntityCategoriesHilbert spacesQuantum measurementTheorems in probability theory