Professor Raúl Rojas has published a book about how symbols have been used throughout history in mathematics. The work was translated into English this year.

In mathematics, the x-intercept of a function or equation refers to the point where the graph of the function or equation intersects the x-axis. Finding the x-intercept is a fundamental skill in ...

ProPublica is a nonprofit newsroom that investigates abuses of power. Sign up to receive our biggest stories as soon as they’re published. ProPublica wanted to know something simple: Where a widely ...

Oppo has confirmed that its new flagship devices, the Find X9 and Find X9 Pro, will launch in India next month. The two devices have been teased in India ahead of the launch, and the Chinese ...

OPPO’s Find X9 series launches with ColorOS 16, bigger batteries, and pro-grade cameras Oppo's Find X9 Pro gets 200MP camera, huge battery, and a Hasselblad add-on. Oppo DUBAI: On a brisk October ...

Oppo Find X9 and the Find X9 Pro have been announced in China with a global launch confirmed for October 28, followed by an India launch two weeks later in November. The devices are the best Oppo has ...

Plus a Hasselblad-branded take on Vivo’s telephoto extender lens. Plus a Hasselblad-branded take on Vivo’s telephoto extender lens. is a news editor with over a decade’s experience in journalism. He ...

Every Wednesday and Friday, TechNode’s Briefing newsletter delivers a roundup of the most important news in China tech, straight to your inbox. Every Wednesday and Friday, TechNode’s Briefing ...

OPPO has globally introduced ColorOS 16, apart from confirming the launch with the Find X9 series phones on October 16. Built on Android 16, the new upgrade introduces smoother performance, smarter AI ...

Oppo’s next premium smartphone, the Find X9 Ultra, is shaping up to be one of the most ambitious camera phones of 2025. But this year, the company is making its top flagship model more distinct from ...

Instagram Threads, Meta’s X rival that now has over 400 million monthly active users, is officially launching a new feature that could redefine how its app is used: Communities. On Thursday, Meta said ...