I was wondering if someone could tell me if I’m understanding the following correctly? This is a quote from Einstein’s book ‘Relativity, the Special and the General Theory.’ Page 155 under Appendix 5. Year 1952. To me, that seems to be saying… Minkowski-space (flat spacetime) can be considered a special case (type1) of a gravitational field. I understand, from elsewhere, the Schwarzschild metric goes smoothly into the metric of flat spacetime. So, is Einstein saying here, taking away the gravitational field (the Schwarzschild metric)would leave no space-time at all. Is my understanding right? The above Appendix 5 can be found here… Put in the www dot ( I’m still too new). relativitybook.com/resources/Einstein_space.html Please Register or Log in to view the hidden image!