## Isotopies of the projective plane in 3-manifolds.(English)Zbl 0363.57003

### MSC:

 57N10 Topology of general $$3$$-manifolds (MSC2010) 57M40 Characterizations of the Euclidean $$3$$-space and the $$3$$-sphere (MSC2010) 57N35 Embeddings and immersions in topological manifolds 55P15 Classification of homotopy type
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