ShyAmalA is one of the chief Tantric goddesses in the Sri vidya krama. She is also one of the mahA-vidyAs of the shakta tradition as she is the mahAvidyA mAtangi herself. She is known with many names like Raja ShyAmalA, Raja mAtangi, matangi, mantriNi etc. All these aspects are similar to goddess Sarasvati. More @Wikipedia
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