An immersion of the projective plane
By closing the corrugated Plücker's conoid, we obtain an immersion of the projective plane (see my PhD thesis).
Inside / Outside
Note that the projective plane, as the Möbius strip, has only one side.
![vue 1](RP2-CP/RP2CP_vue001.png)
![vue 2](RP2-CP/RP2CP_vue002.png)
![vue 3](RP2-CP/RP2CP_vue003.png)
![vue 4](RP2-CP/RP2CP_vue004.png)
![vue 5](RP2-CP/RP2CP_vue005.png)
![vue 6](RP2-CP/RP2CP_vue007.png)
By closing the corrugated Plücker's conoid, we obtain an immersion of the projective plane (see my PhD thesis).
Note that the projective plane, as the Möbius strip, has only one side.