🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaРусскийالعربية한국어中文日本語EntityQ1804812· pop 16· linked from 22 articlesLane–Emden equationdimensionless form of Poisson's equation for the gravitational potential of a Newtonian self-gravitating, spherically symmetric, polytropic fluidConnectionsradius of convergenceEntityInternational Standard Book NumberEntityCategoriesAstrophysicsOrdinary differential equations