Gravitation (2025): Lecture 18 - The Einstein equations

New channel Sunil Mukhi: title sample judged 'pick' (Nearly all uploads are rigorous full physics lecture courses, but a handful of items (memorial human rights lectures, mu); passed a second screen for sellers/exam-prep/re-uploads; 0 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.