Ganita-yukti-bhasa
Ganita-yukti-bhasa (also written as Ganita Yuktibhasa) is either the title or a part of the title of three different books: More on "Ganita-yukti-bhasa (Rationales in Mathematical Astronomy) of Jyesthadeva". This edition of Yuktibhasa has been divided into two volumes, even though the original Malayalam text has no such division. Volume I deals with mathematics and Volume II treats astronomy. Each volume is divided into three parts: First part is an English translation of the relevant Malayalam part of Yuktibhasa, second part contains detailed explanatory notes on the translation, and in the third part  the text in the Malayalam original is reproduced. The English translation is by K.V. Sarma and the explanatory notes are provided by Ramasubramanian, K., Srinivas, M.D. and Sriram, M.S.. Volume I dealing with mathematics is divided into seven chapters. The topics discussed are the eight mathematical operations, a certain set of ten problems, arithmetic of fractions, rule of three, Kuttakara (linear indeterminate equations), infinite series and approximations for the ratio of the circumference and diameter of a circle and infinite series and approximations for sines. Volume II dealing with astronomy is divided into eight chapters. The topics covered are computation  of mean and true longitudes of planets, Earth and celestial spheres, fifteen problems relating to ascension, declination, longitude, etc., determination of time, place, direction, etc., from gnomonic shadow, eclipses, Vyatipata (when the sun and moon have the same declination), visibility correction for planets and phases of the moon.