Abstract: Nonnegative matrix factorization (NMF) is a powerful technique for dimensionality reduction. Conventional NMF algorithms usually keep the matrices W and H nonnegative while iterating.

Social media was abuzz after the Central Board of Secondary Education’s (CBSE) QR code for verification on the Class 12 Mathematics question paper went viral. When scanned, the QR code directed users ...

The Central Board of Secondary Education has moved quickly to contain speculation around the Class 12 mathematics board exam held on March 9. In a press release issued on March 10, the board clarified ...

Did CBSE just Rickroll India? A security QR code on the Class 12 Mathematics question paper reportedly led students to Rick Astley's "Never Gonna Give You Up." Know the board's response and the viral ...

Some students claimed that scanning the code led them to the song 'Never Gonna Give You Up' by Rick Astley, a classic internet "rickroll". A QR code printed on a Class 12 mathematics paper of the ...

The Central Board of Secondary Education said the QR code printed on a Class 12 mathematics question paper is a security feature used to verify the authenticity of examination papers after a student ...

The Central Board of Secondary Education (CBSE) has reassured students and parents that the Class 12 Mathematics board exam papers are authentic and secure. This statement comes after online ...

The issue came into light when the board examination for Class 12 Mathematics was held on March 9, 2026, and some students started sharing videos on various social media sites that revealed that when ...

A claim circulating online suggests that a QR code printed on a Class 12 mathematics exam paper of the Central Board of Secondary Education (CBSE) may have redirected students to a famous internet ...

Students appearing for the CBSE Class 12 Mathematics board exam received a surprise when a QR code printed on the question paper allegedly directed users to Rick Astley's viral "Rickroll" prank video, ...

The Central Board of Secondary Education (CBSE) Class 12 Mathematics question paper sparked a stir on social media on Monday after users claimed that a QR code printed on the paper opened a music ...