several notebooks and min-max functions

[GiggleLiu]

No description provided.

[codecov]

Codecov Report

Merging #74 (1ab7400) into master (4c39185) will decrease coverage by 0.50%.
The diff coverage is 47.36%.

@@            Coverage Diff             @@
##           master      #74      +/-   ##
==========================================
- Coverage   83.40%   82.90%   -0.51%     
==========================================
  Files          30       30              
  Lines        1446     1462      +16     
==========================================
+ Hits         1206     1212       +6     
- Misses        240      250      +10     

Impacted Files	Coverage Δ
src/autodiff/instructs.jl	81.02% <33.33%> (-2.77%)	⬇️
src/stdlib/bennett.jl	86.53% <100.00%> (+0.26%)	⬆️

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