TY - JOUR AU - Shafer, R. E. PY - 1966 DA - 1966// TI - Problem E1867 JO - Am. Math. Mon. VL - 73 ID - Shafer1966 ER - TY - JOUR AU - Shafer, R. E. PY - 1967 DA - 1967// TI - Problems E1867 (solution) JO - Am. Math. Mon. VL - 74 UR - https://doi.org/10.2307/2314285 DO - 10.2307/2314285 ID - Shafer1967 ER - TY - JOUR AU - Qi, F. AU - Zhang, S. Q. AU - Guo, B. N. PY - 2009 DA - 2009// TI - Sharpening and generalizations of Shafer’s inequality for the arc tangent function JO - J. Inequal. Appl. VL - 2009 UR - https://doi.org/10.1155/2009/930294 DO - 10.1155/2009/930294 ID - Qi2009 ER - TY - JOUR AU - Qi, F. AU - Niu, D. W. AU - Guo, B. N. PY - 2009 DA - 2009// TI - Refinements, generalizations, and applications of Jordan’s inequality and related problems JO - J. Inequal. Appl. VL - 2009 UR - https://doi.org/10.1155/2009/271923 DO - 10.1155/2009/271923 ID - Qi2009 ER - TY - JOUR AU - Chen, X. D. AU - Shi, J. AU - Wang, Y. AU - Pan, X. PY - 2017 DA - 2017// TI - A new method for sharpening the bounds of several special functions JO - Results Math. VL - 72 UR - https://doi.org/10.1007/s00025-017-0700-x DO - 10.1007/s00025-017-0700-x ID - Chen2017 ER - TY - JOUR AU - Chen, C. P. AU - Cheung, W. S. AU - Wang, W. PY - 2011 DA - 2011// TI - On Shafer and Carlson inequalities JO - J. Inequal. Appl. VL - 2011 UR - https://doi.org/10.1155/2011/840206 DO - 10.1155/2011/840206 ID - Chen2011 ER - TY - JOUR AU - Shafer, R. E. PY - 1974 DA - 1974// TI - On quadratic approximation JO - SIAM J. Numer. Anal. VL - 11 UR - https://doi.org/10.1137/0711037 DO - 10.1137/0711037 ID - Shafer1974 ER - TY - JOUR AU - Shafer, R. E. PY - 1977 DA - 1977// TI - Analytic inequalities obtained by quadratic approximation JO - Publ. Elektroteh. Fak. Univ. Beogr., Ser. Mat. Fiz. VL - 57 ID - Shafer1977 ER - TY - JOUR AU - Shafer, R. E. PY - 1978 DA - 1978// TI - On quadratic approximation, II JO - Publ. Elektroteh. Fak. Univ. Beogr., Ser. Mat. Fiz. VL - 602 ID - Shafer1978 ER - TY - JOUR AU - Zhu, L. PY - 2008 DA - 2008// TI - On a quadratic estimate of Shafer JO - J. Math. Inequal. VL - 2 UR - https://doi.org/10.7153/jmi-02-51 DO - 10.7153/jmi-02-51 ID - Zhu2008 ER - TY - JOUR AU - Sun, J. -. L. AU - Chen, C. -. P. PY - 2016 DA - 2016// TI - Shafer-type inequalities for inverse trigonometric functions and Gauss lemniscate functions JO - J. Inequal. Appl. VL - 2016 UR - https://doi.org/10.1186/s13660-016-1157-2 DO - 10.1186/s13660-016-1157-2 ID - Sun2016 ER - TY - JOUR AU - Nishizawa, Y. PY - 2017 DA - 2017// TI - Refined quadratic estimations of Shafer’s inequality JO - J. Inequal. Appl. VL - 2017 UR - https://doi.org/10.1186/s13660-017-1312-4 DO - 10.1186/s13660-017-1312-4 ID - Nishizawa2017 ER - TY - JOUR AU - Bercu, G. PY - 2016 DA - 2016// TI - Padé approximant related to remarkable inequalities involving trigonometric functions JO - J. Inequal. Appl. VL - 2016 UR - https://doi.org/10.1186/s13660-016-1044-x DO - 10.1186/s13660-016-1044-x ID - Bercu2016 ER - TY - JOUR AU - Bercu, G. PY - 2017 DA - 2017// TI - The natural approach of trigonometric inequalities—Padé approximant JO - J. Math. Inequal. VL - 11 UR - https://doi.org/10.7153/jmi-11-18 DO - 10.7153/jmi-11-18 ID - Bercu2017 ER - TY - JOUR AU - Bercu, G. AU - Wu, S. PY - 2016 DA - 2016// TI - Refinements of certain hyperbolic inequalities via the Padé approximation method JO - J. Nonlinear Sci. Appl. VL - 9 UR - https://doi.org/10.22436/jnsa.009.07.05 DO - 10.22436/jnsa.009.07.05 ID - Bercu2016 ER - TY - JOUR AU - Brezinski, C. AU - Redivo-Zaglia, M. PY - 2015 DA - 2015// TI - New representations of Padé, Padé-type, and partial Padé approximants JO - J. Comput. Appl. Math. VL - 284 UR - https://doi.org/10.1016/j.cam.2014.07.007 DO - 10.1016/j.cam.2014.07.007 ID - Brezinski2015 ER - TY - BOOK PY - 1972 DA - 1972// TI - Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables PB - National Bureau of Standards CY - Washington ID - ref17 ER -