'io.reactivex:rxjava-math:0.21.0'
<dependency>
<groupId>io.reactivex</groupId>
<artifactId>rxjava-math</artifactId>
<version>0.21.0</version>
</dependency>
<dependency org="io.reactivex" name="rxjava-math" rev="0.21.0"/>
"io.reactivex", "rxjava-math", "0.21.0"