# New in *MathWorld* -- January
2015

### Friday January 23, 2015

- Reflexive Space (modified)

### Tuesday January 20, 2015

### Friday January 16, 2015

- Fibonacci n-Step Number (modified)
- Pell Number (modified)
- Random Permutation (modified)
- Stieltjes Constants (modified)

### Monday January 12, 2015

- Pell Number (modified)

### Tuesday January 6, 2015

- Sphericon (modified)

### Monday January 5, 2015

- Convex (modified)

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