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Acta Mathematica Sinica (English series) is a peer-reviewed mathematics journal published quarterly by Springer.Founded in 1936 and split into a Chinese series and an English series in 1985, the journal publishes articles on all areas of mathematics, and allows submissions from researchers of all nationalities.
Acta Mathematicae Applicatae Sinica (English series) is a peer-reviewed mathematics journal published quarterly by Springer. Established in 1984 by the Chinese Mathematical Society, the journal publishes articles on applied mathematics. According to the Journal Citation Reports, the journal had a 2020 impact factor of 1.102. [1]
Acta Mathematica is a peer-reviewed open-access scientific journal covering research in all fields of mathematics. According to Cédric Villani , this journal is "considered by many to be the most prestigious of all mathematical research journals". [ 1 ]
Ptolemy's theorem states that the sum of the products of the lengths of opposite sides is equal to the product of the lengths of the diagonals. When those side-lengths are expressed in terms of the sin and cos values shown in the figure above, this yields the angle sum trigonometric identity for sine: sin(α + β) = sin α cos β + cos α sin β.
Sun Song (Chinese: 孙崧; pinyin: Sūn Sōng, born in 1987) is a Chinese mathematician whose research concerns geometry and topology.A Sloan Research Fellow, he was a professor in the Department of Mathematics of the University of California, Berkeley from 2018 until 2023.
The area of triangle OAD is AB/2, or sin(θ)/2. The area of triangle OCD is CD/2, or tan(θ)/2. Since triangle OAD lies completely inside the sector, which in turn lies completely inside triangle OCD, we have < < .
Acta Applicandae Mathematicae is a peer-reviewed mathematics journal published by Springer. Founded in 1983, the journal publishes articles on applied mathematics. The journal is indexed by Mathematical Reviews and Zentralblatt MATH. According to the Journal Citation Reports, the journal has a 2020 impact factor of 1.215. [1]
Acta Numerica is a mathematics journal publishing research on numerical analysis. It was established in 1992 to publish widely accessible summaries of recent advances in the field. [ 1 ] One volume is published each year, consisting of review and survey articles from authors invited by the journal's editorial board.