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References to 'loop'
1. $\operatorname{arc tan}$ with two arguments by matte
2. cone in $\mathbb{R}^3$ by pahio
3. curve by rmilson
4. deck transformation by mathcam
5. example of a semilocally simply connected space which is not locally simply connected by antonio
6. example of a space that is not semilocally simply connected by mathcam
7. Hopf theorem by jirka
8. Java by PrimeFan
9. loop space by mathcam
10. Markov algorithm by CWoo
11. precategory by CWoo
12. primitive recursive function by CWoo
13. recursive function by rspuzio
14. ternary ring by CWoo
15. topics on low dimensional topology by juanman
16. URM computable by CWoo