# New in *MathWorld* -- April
2019

### Tuesday April 30, 2019

- Distance-Regular Graph (modified)
- Distance-Transitive Graph (modified)
- Hypercube Graph (modified)

### Monday April 29, 2019

- Cube-Connected Cycle Graph (modified)

### Wednesday April 24, 2019

- Aperiodic Tiling (modified)

### Tuesday April 23, 2019

- Cubic Number (modified)
- Domination Number (modified)
- Outerplanar Graph (modified)
- Prime Triplet (modified)
- Rectilinear Crossing Number (modified)

### Thursday April 18, 2019

- Outerplanar Graph (modified)

### Tuesday April 16, 2019

- Burning Number
- Spikey (modified)

### Monday April 15, 2019

- Antelope Graph (modified)

### Sunday April 14, 2019

- Fiveleaper Graph (modified)

### Friday April 12, 2019

- Smallest Cubic Crossing Number Graph (modified)

### Thursday April 11, 2019

- Smallest Cubic Crossing Number Graph (modified)

### Wednesday April 10, 2019

- Smallest Cubic Crossing Number Graph (modified)

### Monday April 8, 2019

- Graph Crossing Number (modified)
- Smallest Cubic Crossing Number Graph (modified)

### Saturday April 6, 2019

### Friday April 5, 2019

### Thursday April 4, 2019

- Pompeiu's Theorem (modified)
- Rectilinear Crossing Number (modified)

### Wednesday April 3, 2019

### Monday April 1, 2019

- Rectilinear Crossing Number (modified)

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