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Latest from the Blog
Deep dives, workflow tips, and practical guides for LaTeX users
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How to Write Chemistry in LaTeX with mhchem
Chemical formulae, charges, reaction arrows, states and isotopes with the mhchem package, plus how to rebuild the dense chemistry tables that appear in journal papers.
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LaTeX Align Environment: Multi-Line Equations Done Right
How the align environment really works, where to put the ampersand, numbering and labels with eqref, and when to reach for gather, split or cases instead.
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Real Numbers Symbol (ℝ): Meaning, Number Sets and LaTeX
The symbol for all real numbers explained: ℝ and the nested sets ℕ ⊂ ℤ ⊂ ℚ ⊂ ℝ ⊂ ℂ, how to type each one, and why \mathbb needs the amssymb package.
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Not Equal Symbol (≠): Meaning, How to Type It, and LaTeX
The not equal sign explained: ≠ against ≈ and ≡, why code writes != instead, and how to type it on Windows, Mac, in HTML and in LaTeX. Copy it here.
July 22, 2026
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Union Symbol (∪) and Intersection (∩): Meaning and LaTeX
The union and intersection symbols explained: what ∪ and ∩ mean, inclusion-exclusion, interval notation and De Morgan's laws. With alt codes and LaTeX.
July 17, 2026
Article
Tau Symbol (τ): Torque, Time Constant and LaTeX
The tau symbol explained: τ as torque, the RC time constant, shear stress and proper time. Copy the character, with Unicode, alt codes and LaTeX commands.
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