Hadith of Golden Chain of that the hadith is called "golden chain". Because of that, this hadith was named Al-Silsilah al-Dhahab. Al-Silsilah al-Dhahab is Musnad. Twenty (or ten or thirty) thousands have narrated this event, but only fifty narrations are available. The chain of the narrators of the hadith reaches the Prophet of Islam through Ahl al-Bayt, hence called Hadith of Golden Chain. Hadith of Golden Chain Hadith al-Silsilah al-Dhahab () (Hadith of the Golden Chain) is a hadith narrated from Ali al-Ridha, the eighth Imam of the Shia. The "chain" is a reference to the continuity of spiritual authority which is passed down
Genus (mathematics) manifold of complex points). For example, the definition of elliptic curve from algebraic geometry is "connected non-singular projective curve of genus 1 with a given rational point on it". By the Riemann-Roch theorem, an irreducible plane curve of degree "d" has geometric genus where "s" is the number of singularities when properly counted. Genus can be also calculated for the graph spanned by the net of chemical interactions in nucleic acids or proteins. In particular, one may study the growth of the genus along the chain. Such a function (called the genus trace) shows the topological complexity and domain structure