Project/Area Number  09640061 
Research Category 
GrantinAid for Scientific Research (C)

Allocation Type  Singleyear Grants 
Section  一般 
Research Field 
Algebra

Research Institution  Kogakuin University 
Principal Investigator 
MAKINO Isao Kogakuin University, DEPARTMENT of Engineering Professor, 工学部, 教授 (10157167)

Project Period (FY) 
1997 – 1998

Project Status 
Completed(Fiscal Year 1998)

Budget Amount *help 
¥500,000 (Direct Cost : ¥500,000)
Fiscal Year 1998 : ¥500,000 (Direct Cost : ¥500,000)

Keywords  computer algebra / elementary transcendental function / arbitrary digits / continued fraction 
Research Abstract 
In Symbolic Algebraic Manuplation, time of caluclating elementary trancendental functions are slow than Fortran and C.So we want to fast computing the functions. We used continued fraction and integer computing. In the computing we use only one division. The error is got by Stirling formula. Our computing are firster than Pan GP which is wellknown as fast computing language. For example expornetian and tangent are 10 Pines faster and anctangent is 30 or 40 percent faster in 30000 digits. But log is same or a little slower. We will improve the method on computing of continued fraction.
