# New in *MathWorld* -- January
2019

### Sunday January 27, 2019

- Prime-Generating Polynomial (modified)

### Friday January 25, 2019

- Pentagram (modified)

### Sunday January 20, 2019

- Nu Function (modified)

### Friday January 18, 2019

- Matchstick Graph (modified)

### Thursday January 17, 2019

- Graph Crossing Number (modified)

### Wednesday January 16, 2019

- Generalized Diameter (modified)
- Icosahedral Group (modified)
- Octahedral Group (modified)
- Tetrahedral Group (modified)

### Wednesday January 9, 2019

- Cube (modified)
- Dodecahedron (modified)
- Hexagonal Close Packing (modified)
- Regular Dodecahedron (modified)
- Regular Icosahedron (modified)
- Regular Octahedron (modified)
- Regular Tetrahedron (modified)
- Rhombo-Trapezoidal Dodecahedron
- Rhombotrapezoidal Dodecahedron
- Space-Filling Polyhedron (modified)
- Trapezo-Rhombic Dodecahedron
- Trapezorhombic Dodecahedron

### Monday January 7, 2019

- Isolated Point (modified)

### Sunday January 6, 2019

- Catalan's Constant Continued Fraction (modified)
- Glaisher-Kinkelin Constant Continued Fraction (modified)
- Khinchin's Constant Continued Fraction (modified)

### Friday January 4, 2019

- Bilinski Dodecahedron (modified)
- Cubic Close Packing (modified)
- e Continued Fraction (modified)
- Rhombic Dodecahedral Graph (modified)
- Sphere Packing (modified)

### Thursday January 3, 2019

- Dodecahedron (modified)
- Golden Rhombic Dodecahedron
- Hexahedron (modified)

### Wednesday January 2, 2019

- Acute Golden Rhombohedron
- Bilinski Dodecahedron
- Golden Isozonohedron
- Golden Rhombohedron (modified)
- Golden Rhombus (modified)
- Obtuse Golden Rhombohedron
- Rhombic Dodecahedron (modified)
- Rhombic Icosahedron (modified)
- Rhombic Triacontahedron (modified)
- Zonohedron (modified)

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