# New in *MathWorld* -- December
2018

### Sunday December 23, 2018

- Integer Sequence Primes (modified)
- Mersenne Prime (modified)
- Prime Number (modified)
- Titanic Prime (modified)

### Thursday December 20, 2018

- Rhombic Hexecontahedron (modified)

### Monday December 17, 2018

- Golden Rhombus (modified)
- Rhombic Hexecontahedron (modified)
- Rhombic Triacontahedron (modified)

### Wednesday December 12, 2018

- Augmentation (modified)
- Augmented Dodecahedron (modified)
- Augmented Hexagonal Prism (modified)
- Augmented Pentagonal Prism (modified)
- Augmented Polyhedron (modified)
- Augmented Sphenocorona (modified)
- Augmented Triangular Prism (modified)
- Augmented Tridiminished Icosahedron (modified)
- Augmented Truncated Cube (modified)
- Augmented Truncated Dodecahedron (modified)
- Augmented Truncated Tetrahedron (modified)
- Diminished Polyhedron (modified)
- Diminished Rhombicosidodecahedron (modified)
- Dual Polyhedron (modified)
- Midpoint Augmentation
- Polyhedron (modified)
- Truncated Polyhedron (modified)
- Truncation (modified)

### Tuesday December 11, 2018

- Golden Angle (modified)
- Golden Rhombus (modified)
- Rhombic Hexecontahedron (modified)

### Sunday December 9, 2018

- Augmentation (modified)

### Saturday December 8, 2018

- Four-Color Theorem (modified)
- McGregor Graph
- McGregor Map

### Friday December 7, 2018

- Black Bishop Graph (modified)

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