It is a standard fact that smashing with a fixed spectrum ZZ preserves cofiber sequences. So if I have a cofiber sequence XxrightarrowfYrightarrowCf then there is also a cofiber sequence ZwedgeXrightarrowZwedgeYrightarrowZwedgeCf
If more generally I have a map ZxrightarrowgW, is there any formula for the cofiber of the map ZwedgeXxrightarrowgwedgefWwedgeY in terms of Cf and Cg? (The above discussion corresponding to g=mathrmidZ).
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