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What is the earliest sci-fi story to mention another real sci-fi work as fiction within its own universe?

history-of science-fiction-genre trope 2 answers | asked yesterday by galacticninja on scifi

$Mathematics Stack Exchange$

Minimum area of a quadrilateral that can be inscribed in a square while respecting the given areas of the four right-angled triangles.

geometry optimization euclidean-geometry quadrilateral 2 answers | asked 18 hours ago by Jamil Sanjakdar on math

Glued P Trap Nut?

plumbing kitchen-sink p-trap 1 answers | asked 11 hours ago by Brandon Flanery on diy

How do Massive Damage and reduced maximum HP interact?

damage dnd-5.5e hit-points character-death 1 answers | asked 15 hours ago by Valkoinen on rpg

How to write a grant application in 2026?

soft-question grants 2 answers | asked 12 hours ago by Vladis on mathoverflow

(Unsigned) Integer to Text conversion (C)

algorithm c numbers-to-words 4 answers | asked yesterday by user32850930 on codereview

$TeX - LaTeX Stack Exchange$

Latex table goes below the footnote

tables footnotes latex-base 4 answers | asked 23 hours ago by barej on tex

What does the blowup solution to Navier–Stokes mean for real-life liquids?

fluid-dynamics flow singularities navier-stokes 4 answers | asked Sep 10 at 6:29 by quarague on physics

Why does R not warn about ties in wilcox.test()

ties 3 answers | asked 2 days ago by DAVID PAUL CAPELLE on stats

Different publication model in the new era of AI generated math

soft-question artificial-intelligence 2 answers | asked 12 hours ago by Beni Bogosel on mathoverflow

Could vocal pitch be corrected in recordings before Auto-Tune?

recording production studio autotune 1 answers | asked 12 hours ago by user140898 on music

What lane am I in?

code-golf number 25 answers | asked 2 days ago by Jordan on codegolf

Which balls are bigger?

mathematics geometry 2 answers | asked 21 hours ago by Dan on puzzling

Confusing figured bass notation in "The Practical Harmonist at the Harpsichord"

harmony figured-bass 2 answers | asked 14 hours ago by Clark on music

What are the cons of disabling Microsoft OneDrive?

microsoft-onedrive 3 answers | asked 2 days ago by Steve on superuser

Why is lying wrong?

ethics truth 13 answers | asked Sep 10 at 6:30 by user121290 on philosophy

The Animal ?ame (Two Columns With Two Different Types of Associations)

knowledge enigmatic-puzzle 1 answers | asked 21 hours ago by Prim3numbah on puzzling

$TeX - LaTeX Stack Exchange$

Undersetting a hat is creating a lot of extra space

math-mode spacing 2 answers | asked yesterday by Sriotchilism O'Zaic on tex

Entry to save life or limb based on abandoned 999 call

united-kingdom police search-and-seizure 3 answers | asked 2 days ago by deee on law

Why are disc brakes seen as better than rim brakes?

disc-brake 5 answers | asked yesterday by Julius Karl Hamilton on bicycles

I have published a wrong paper

publications retraction 4 answers | asked yesterday by BazooJoe on academia

How can an LED fed through a relay "pulse?"

capacitor led relay oscillator 1 answers | asked 20 hours ago by planarian on electronics

$TeX - LaTeX Stack Exchange$

Issue in getting ribbon effects using Latex on Arrow in the infographics

tikz-pgf arrow-curve 4 answers | asked yesterday by Kashi on tex

Lions and Zebras with restricted zebra movement directions

mathematics strategy pursuit-evasion 3 answers | asked yesterday by Skill Cycler on puzzling

What is the origin of the word "caliper" in reference to brakes?

etymology 1 answers | asked 18 hours ago by Julius Karl Hamilton on english

Does number distribution on a die matter?

dice 3 answers | asked 2 days ago by enkryptor on rpg

Movie about bar crawls, robots, and the end of the world…

story-identification movie robots apocalypse 1 answers | asked yesterday by Allie on scifi

Increment number at point

evil numbers 3 answers | asked yesterday by J. Mini on emacs

which way does the raven caw?

cipher story puzzle-creation acrostic 1 answers | asked 12 hours ago by amaturepuzzleguy on puzzling

Is using an op amp as comparator inevitable in my case?

operational-amplifier comparator 2 answers | asked yesterday by e_asphyx on electronics

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