RAVI’S SUBSTITUTIONS OR VOICULESCU’S SUBSTITUTIONS?

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Article by Dorin Marghidanu, Marian Dincă-Romania RAVI’S SUBSTITUTIONS OR VOICULESCU’S SUBSTITUTIONS  

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Math Note by Marian Dincă-Romania ABOUT PROBLEM 377-LA GACETA DE LA RSME

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Article by Daniel Sitaru-Romania DINCA’S REFINEMENT FOR NESBITT’S INEQUALITY

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Math Note by Marian Dinca-Romania A NEW DEMONSTRATION FOR PTOLEMY’S GENERALIZED THEOREM

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Article by Marian Dinca-Romania Figure belongs to Catalin Barbu-Romania A NEW PROOF OF RAMUS E.-ROUCHE&BLUNDON DOUBLE INEQUALITY