Stratifiable spaces as subspaces and continuous images of 𝑀₁-spaces

Stratifiable spaces as subspaces and continuous images of $M_{1}$-spaces
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by Robert W. Heath and Heikki J. K. Junnila PDF

Proc. Amer. Math. Soc. 83 (1981), 146-148 Request permission

It is shown that every stratifiable space is the image of an ${M_1}$-space under a perfect retraction.

References

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-discrete stratifiable spaces are

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