# Chapter 9 - Part 1

This is the content for Friday, March 20, 2026.

## Covered in this lecture

- Stationarity: [D2L Video](https://d2l.msu.edu/d2l/le/lessons/2387926/topics/19115258), [MediaSpace](https://mediaspace.msu.edu/media/1_ihuqlnze)
- Stationarity in convex problems: [D2L Video](https://d2l.msu.edu/d2l/le/lessons/2387926/topics/19115259), [MediaSpace](https://mediaspace.msu.edu/media/1_o2et1zqp)
- Orthogonal projection revisited: [D2L Video](https://d2l.msu.edu/d2l/le/lessons/2387926/topics/19115341), [MediaSpace](https://mediaspace.msu.edu/media/1_8kz9qcki)
- Gradient projection method: [D2L Video](https://d2l.msu.edu/d2l/le/lessons/2387926/topics/19115343), [MediaSpace](https://mediaspace.msu.edu/media/1_2zcnwvu0)

## Todos

### Before class

- Watch videos above.

### In class

- [Slides](Slides/Lec9_1-Slides.md)
- [Worksheet](WS/Lec9_1-WS.md)
  
### After class

- Upload worksheet to Crowdmark by 5pm.
- [Homework 4](../../../homework/HW4/HW4) is due TODAY on crowdmark.
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