Author of the No Bullshit Guide textbook series. Founder of the Minirefrence Publishing company.

No Bullshit Guide to Mathematics => https://noBSmath.com (high school math review)

No Bullshit Guide to Math & Physics => https://minireference.com (mechanics and calculus)

No Bullshit Guide to Linear Algebra => http://gum.co/noBSLA

No Bullshit Guide to Statistics => http://gum.co/noBSstats (data, probability, and statistical inference)

I previously used the account https://news.ycombinator.com/user?id=ivan_ah but trying to standardize my socials: https://x.com/ivansavz - https://mathstodon.xyz/@ivansavz - https://bsky.app/profile/ivansavz.bsky.social