so i tried to do this commutative diagram using tikz. However, no success. I tried using google and reading manuals but unfortunately, i either didnt understand the syntax or it didnt fit my needs. i really could use some help. the diagram itself is pretty basic. i would really a ppreciate it if someone could either help me drawing it or point me towards a good tutorial/manual where i can learn from.
this is the diagram i was trying to do:
thank you very much

{}button to copy the code. – Henri Menke Mar 22 '18 at 20:23