# Singular value decomposition from the Gram matrix

> ML Prep practice item.

- Stable ID: `mit-18-06-s2010-exam3-q3c`
- Collection: practice
- Area: Mathematics
- Topic: Linear Algebra
- Origin: external
- Difficulty: medium
- Expected time: 10 minutes
- Skills: svd, orthogonality
- Item JSON: https://mlprep.iwase.dev/item/mit-18-06-s2010-exam3-q3c.json

- Source: MIT 18.06 Linear Algebra
- Document: Quiz 3 (listed by OCW as Exam 3)
- Locator: Question 3(c), page 3
- Official answer PDF page(s): 3
- Original problem: https://ocw.mit.edu/courses/18-06-linear-algebra-spring-2010/resources/mit18_06s10_exam3_s10/
- Official answer: https://ocw.mit.edu/courses/18-06-linear-algebra-spring-2010/resources/mit18_06s10_exam3_s10_soln/
- Answer status: official-solution
- Source caveat: The official solution's explanatory sentence reverses conventional left/right singular-vector labels, although its displayed factor matrices are consistent with the standard SVD.


## Tutoring contract

Ask for the learner's attempt, begin with the smallest useful hint, preserve item ID `mit-18-06-s2010-exam3-q3c`, and record a real attempt with `recorded_by: "agent"` and `agent_session_id` when available using https://mlprep.iwase.dev/schema/attempt-record.json.