Explores derivative notation, definition, differentiation rules, chain rule, and properties including continuity, differentiability, and parity relationships.

Overview of discontinuity points in functions, including first-kind (removable, jump) and second-kind (infinite, oscillatory) discontinuities.

Guide to share Bluetooth device pairing between Ubuntu and Windows by extracting and modifying LTK, IRK, and address.

Replace a NAS with an OpenWrt router running Rclone to mount a cloud drive via WebDAV, then share it over Samba for Xiaomi camera video storage.

An overview of number system expansions from natural to complex numbers, driven by the non-closure of arithmetic operations.