On a Conjectured Inequality for a Sum of Legendre Polynomials

∗This work was financially supported by the Austrian Science Foundation (FWF) grant SFB F013 and the Christian Doppler Research Association (CDG). S. Gerhold gratefully acknowledges a fruitful collaboration and continued support by the Austrian Federal Financing Agency and Bank Austria through CDG. M. Kauers was supported by the Austrian Science Foundation FWF under SFB F013 grant number F1305 and under grant number P16613-N12. J. Schöberl was supported by the Austrian Science Foundation FWF under SFB F013 grant number F1306.