I downloaded the most recent version of Raspbian 2018-04-18-raspbian-stretch-lite and then tried to installed Mathematica using
# apt-get install wolfram-engine
I received the error messages
Error occurred during initialization of VM
Server VM is only supported on ARMv7+ VFP
Which appear to be coming from attempts to configure ca-certificates-java, openjdk-9-jre and openjdk-9-jre-headless on a Pi Zero.
Are new versions of Raspbian and Mathematica compatible with ARMv6 machines?
What should I do to solve this problem?