Equator

Equator. A function calculator. Equator is a software package that generates numerical values for over 200 mathematical functions. By using the “variable ranging” facility, one can get the values of a function for a given range of a variable, defined by the lower and upper bounds and an increment. Equator has no plotting capability, but to graph the output of a ranged calculation, one can easily transfer the data to graphing software (e.g. Excel). An input variable can be constructed in a general form as x=wt p +k, with the default values w=1, p=1, k=0, corresponding to x=t. Most of the answers are provided with 15-digit precision. The software is able to detect when precision is likely to have been lost and it curtails the output, reporting only the significant digits. The basic formulas for the algorithms used by Equator are available in the book by the same authors [An atlas of functions. With Equator, the atlas function calculator. With CD-ROM. 2nd ed. New York, NY: Springer (2008; Zbl 1167.65001)].


References in zbMATH (referenced in 28 articles , 1 standard article )

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  1. Yang, Zhen-Hang; Tian, Jing-Feng: Sharp bounds for the ratio of two zeta functions (2020)
  2. Bizyaev, I. A.; Borisov, A. V.; Kozlov, V. V.; Mamaev, I. S.: Fermi-like acceleration and power-law energy growth in nonholonomic systems (2019)
  3. Breiding, Paul: How many eigenvalues of a random symmetric tensor are real? (2019)
  4. González-Santander, J. L.; Monreal, Llúcia: Efficient temperature field evaluation in wet surface grinding for arbitrary heat flux profile (2019)
  5. Laha, Arnab Kumar; Pravida Raja, A. C.; Mahesh, K. C.: SB-robust estimation of mean direction for some new circular distributions (2019)
  6. Lohvinenko, S. S.; Ralchenko, K. V.: Asymptotic distribution of the maximum likelihood estimator in the fractional Vašíček model (2019)
  7. Uzun, Banu Ünalmış: On the fractional sums of some special functions (2019)
  8. Choi, Junesang; Parmar, Rakesh K.; Srivastava, H. M.: The incomplete Lauricella functions of several variables and associated properties and formulas (2018)
  9. Deif, Sarah A.; Grace, Said R.: Fast iterative refinement method for mixed systems of integral and fractional integro-differential equations (2018)
  10. González-Santander, J. L.: Surface derivative method for inverse thermal analysis in dry grinding (2018)
  11. Agarwal, Praveen; Qi, Feng; Chand, Mehar; Jain, Shilpi: Certain integrals involving the generalized hypergeometric function and the Laguerre polynomials (2017)
  12. Berra-Montiel, Jasel; Martínez-Montoya, Jairo; Molgado, Alberto: The Unruh effect for higher derivative field theory (2017)
  13. Lim, Kar Wai; Buntine, Wray; Chen, Changyou; Du, Lan: Nonparametric Bayesian topic modelling with the hierarchical Pitman-Yor processes (2016)
  14. Mahmoud, Mansour; Agarwal, Ravi P.: Bounds for Bateman’s (G)-function and its applications (2016)
  15. Shakil, M.; Ahsanullah, M.: Characterizations of the distribution of the Demmel condition number of real Wishart matrices (2016)
  16. Boyd, John P.: Four ways to compute the inverse of the complete elliptic integral of the first kind (2015)
  17. Choi, Junesang; Parmar, Rakesh Kumar: The incomplete Lauricella and fourth Appell functions (2015)
  18. Li, Yong-Min; Xia, Wei-Feng; Chu, Yu-Ming; Zhang, Xiao-Hui: Optimal lower and upper bounds for the geometric convex combination of the error function (2015)
  19. Xia, Weifeng; Chu, Yuming: Optimal inequalities for the convex combination of error function (2015)
  20. Ali, S. Twareque; Górska, K.; Horzela, A.; Szafraniec, F. H.: Squeezed states and Hermite polynomials in a complex variable (2014)

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