The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2026
Filed:
Oct. 10, 2019
Ntt, Inc., Tokyo, JP;
Koki Hamada, Musashino, JP;
NTT, Inc., Tokyo, JP;
Abstract
An approximate function calculation apparatus includes: a first error upper bound calculating unit which obtains an upper bound of a first error of an approximation of a function f(x) by the function g(x) in a section [x, b]; an expansion position calculating unit which obtains an expansion position b' that represents a maximum b at which the upper bound of the first error; a second error upper bound calculating unit which obtains an upper bound of a second error of an approximation of the function f(x) by a function g′(x) in a section [b′, x]; a right end position calculating unit which calculates a right end position x′ that represents a maximum xat which the upper bound of the second error; and a control unit which repeats processing of the respective units with a section [x′, x] as the section D.