# New in *MathWorld* -- September
2020

### Thursday September 24, 2020

- Mersenne Prime (modified)

### Wednesday September 23, 2020

- Burning Number (modified)

### Tuesday September 22, 2020

- Graceful Labeling (modified)

### Thursday September 10, 2020

- Strassen Formulas (modified)

### Wednesday September 9, 2020

- Stellation (modified)

### Friday September 4, 2020

- Chordless Cycle (modified)
- Cycle Chord (modified)
- Graph Hole (modified)

### Thursday September 3, 2020

- Circulant Graph (modified)
- Stellation (modified)
- Unit-Distance Graph (modified)

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