What is the meaning of positive acceptus in Gauss' Disquisitiones Arithmeticae §131?

1. What was the first systematic textbook on algebraic number theory?
2. What is the translation of Disquisitiones Arithmeticae?

What was the first systematic textbook on algebraic number theory?

Disquisitiones Arithmeticae was the first systematic textbook on algebraic number theory. Gauss also wrote about the orbit of the asteroid Ceres.

What is the translation of Disquisitiones Arithmeticae?

The Disquisitiones Arithmeticae (Latin for "Arithmetical Investigations") is a textbook of number theory written in Latin by Carl Friedrich Gauss in 1798 when Gauss was 21 and first published in 1801 when he was 24.