I am no expert in equivariant homotopy theory. Let's say, I am planing to give a talk on homotopy fixed points and orbits. My audience will be graduate students who are doing algebraic topology or others who have fair knowledge of basic algebraic topology.
I want to give lot of computational examples of fairly basic but illuminating examples homotopy orbits and homotopy fixed points and illustrate that
- Homotopy orbits or fixed points differ from ordinary fixed points and ordinary orbits.
- Examples two $G$-homotopyhomotopy equivalent spaces, where the $G$-fixed points of respective spaces are not homotopic or the $G$-orbits of respective spaces are not homotopic.
However, I want to avoid examples involving spectra.
Please help me in creating a substantial list of examples/counterexamples/results (of any kind) related to homotopy fixed points and orbits that is suitable for an introductory/motivational talk. References will also be appreciated.