On the Equivalence of the Buchdahl and the Janis–newman–winnicour Solutions

We comment that the static and spherically symmetric solutions to the Einstein-minimally coupled scalar field theory as obtained independently by Buchdahl and Janis–Newman–Winicour (JNW) are the same. Since it is already known that JNW and Wyman solutions are not different, 1 therefore we conclude that Buchdahl, JNW and Wyman solutions are the same.