# New in *MathWorld* -- April
2018

### Friday April 27, 2018

- Matchstick Graph (modified)

### Friday April 20, 2018

### Tuesday April 17, 2018

- de Grey Graphs (modified)
- Golomb Graph (modified)
- Hadwiger-Nelson Problem (modified)
- Moser Spindle (modified)

### Sunday April 15, 2018

- de Grey Graphs
- Hadwiger-Nelson Problem (modified)

### Friday April 13, 2018

- Path Complement Graph (modified)

### Thursday April 12, 2018

### Tuesday April 10, 2018

- Hypercube Graph (modified)
- Mersenne Prime (modified)
- Total Domination Number (modified)
- Woodall Number (modified)
- Woodall Prime

### Monday April 9, 2018

- Dominating Set (modified)
- Domination Number (modified)
- Goddard-Henning Graph
- Total Dominating Set

### Thursday April 5, 2018

### Tuesday April 3, 2018

- Idiosyncratic Polynomial (modified)

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