Jain works could have been destroyed. Historical rivalry among Hinduism, Jainism and Buddhism is well known. The Age of the Puranas (1020–1400 CE) This is the period of Kavi Trayam or Trinity of Poets. Nannayya, Tikkana and Yerrapragada (or Errana) are known as the Kavi Trayam. Nannaya Bhattarakudu or Adi Kavi (1022–1063 CE) Nannaya Bhattarakudu's (Telugu: నన్నయ) Andhra Mahabharatam, who lived around the 11th century, is commonly referred to as the first Telugu literary composition (aadi kaavyam). Although there is evidence of Telugu literature before Nannaya, he is given the epithet Aadi Kavi ("the first poet"). Nannaya Bhattu acknowledged the help extended to him by his friend Narayana Bhattu in his composition in fields like making choices of grammatical forms, metres, form of the book, etc. and compares it to that extended to Arjuna by God Sri Krishna in the Bharata war. Scholar and poet K. Ayyappa Paniker states that both Nannaya Bhattu and Narayana Bhattu were Kannada origin scholars. Nannaya was the first to establish a formal grammar of written Telugu. This grammar followed the patterns which existed in grammatical treatises like Aṣṭādhyāyī and Vālmīkivyākaranam but unlike Pāṇini, Nannayya divided his work into five chapters, covering samjnā, sandhi, ajanta, halanta and kriya.[14] Nannaya completed the first two chapters and a part of the third chapter of the Mahabharata epic, which is rendered in the Champu style. Tikkana Somayaji (1205–1288 CE): Nannaya's Andhra Mahabharatam was almost completed by Tikanna Somayaji (Telugu: తిక్కన సోమయాజి) (1205–1288) who wrote chapters 4 to 18. Yerrapragada: (Telugu: ఎర్రాప్రగడ) who lived in the 14th century, finished the epic by completing the third chapter. He mimics Nannaya's style in the beginning, slowly changes tempo and finishes the chapter in the writing style of Tikkana. These three writers – Nannaya, Tikanna and Yerrapragada – are known as the Kavitraya ("three great poets") of Telugu. Other such translations like Marana's Markandeya Puranam, Ketana's Dasakumara Charita, Yerrapragada's Harivamsam followed. Many scientific works, like Ganitasarasangrahamu by Pavuluri Mallana and Prakirnaganitamu by Eluganti Peddana, were written in the 12th century. Baddena Bhupala (1220–1280 CE) Sumati Shatakam, which is a neeti ("moral"), is one of the most famous Telugu Shatakams. Shatakam is composed of more than a 100 padyalu (poems). According to many literary critics Sumati Shatakam was composed by Baddena Bhupaludu (Telugu: బద్దెన భూపాల) (CE 1220–1280). He was also known as Bhadra Bhupala. He was a Chola prince and a vassal under