Fix Izhikevich model equation in the documentation

[egorus1]

Solved issue about not rendered equation on the following page: https://nest-simulator.readthedocs.io/en/latest/models/izhikevich.html

Also I centered it, to make it look better with another equation.

[jessica-mitchell]

Fixes #3219

[clinssen]

Could you make the variable naming of u/U_m consistent? Cheers!

[egorus1]

Could you make the variable naming of u/U_m consistent? Cheers!

@clinssen Are you talking about these lines of code?

nest-simulator/models/izhikevich.h

Line 209 in bf55cc4

double u_; // membrane recovery variable

[clinssen]

The alignment should probably be done globally via CSS or other options instead; entering spaces like this is a bit too ad-hoc and can break things in the future.

Re the naming, see

nest-simulator/models/izhikevich.h

Line 88 in bf55cc4

V_m mV Membrane potential

and the line after it.

[egorus1]

Hi! I made changes, let me know if it's okay now)

[jessica-mitchell]

@clinssen I was looking at the Izhikevich model in nestml, and noticed the use of v and u in the first equation but in NEST we used V_m and u (except there is a v in the last line of that second part of the equation).

Is v equivalent to V_m? and should u stay or should it be U_m?

[jessica-mitchell]

hi @PrabhuUdurg after reviewing with @pnbabu, we realize that the u should be U_m and any case of v should be V_m. I made some suggestions but could you please check the page if there are any cases of u or v that still need to be updated. Thanks!

[egorus1]

@jessica-mitchell I will change it and submit new pull request, thanks!

[jessica-mitchell]

@PrabhuUdurg Can you also update lines 59 - 68, where u and v are mentioned and change them to the correct ones?
Also, can you merge master - we had an update that fixes a test and our CI pipeline won't pass unless your branch is up-to-date with master.

[egorus1]

@jessica-mitchell Should v on line 60 be changed to V_m too?

[jessica-mitchell]

@jessica-mitchell Should v on line 60 be changed to V_m too?

yep

[jessica-mitchell]

Thanks @PrabhuUdurg looks good!

[egorus1]

Thanks @PrabhuUdurg looks good!

Thank you for assistance! My first merged request)