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A puzzle for students of all ages. #RecreationalMath #iTeachMath #MathSky
What's your Erdős number? Mine is 5. 
#AcademicSky #MathSky #Math
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New blog post! "Mental Math Monday" summarizing last week's question and many different calculation strategies.
#MTBoS #iTeachMath #T3Learns #MathChat #MentalMathMonday #MathStratChat #ElemMathChat #MathSky #MathsToday #ClassroomMath
Thanks to Howie Hua!!!
https://karendcampe.wordpress.com/2025/04/07/mental-math-monday/
Reflections and Tangents · Mental Math MondayLast week, I was the guest questioner for Howie Hua’s Mental Math Monday prompt that he posts on his social media accounts1. I asked, “How would you calculate 15 x 22?” and plenty of folks shared t…
Maths Mastermind - Day 80
BOOST YOUR BRAIN POWER WITH THIS FUN #MATHEMATICS #PUZZLE !!!
Maths Mastermind - Day 79
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Maths Mastermind - Day 78
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Maths Mastermind - Day 77
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![Start with the Dirac equation:
\[
\mathcal{D}\psi = (\gamma\cdot p - m)\psi = 0\,.
\]
For non-trivial solutions of \(\psi\), i.e. \(\psi\neq0\), we need the Dirac operator \(\mathcal{D}\) to be singular and non-invertable. Therefore
\[
{\rm det}(\mathcal{D}) = 0\,.
\]
The determinant evaluates to
\[
{\rm det}(\mathcal{D}) = (p^{2} - m^{2})^{2} = 0\,,
\]
which we rearrange to
\[
p^{2} = E^{2} - \vec{p}\cdot\vec{p} = m^{2}\,.
\]
The above is the relativistic energy-momentum relation.](https://files.ohai.social/cache/media_attachments/files/114/113/126/282/057/039/small/c9301363cbcfcd1f.jpeg)
Maths Mastermind - Day 76
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Maths Mastermind - Day 75
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Maths Mastermind - Day 74
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Maths Mastermind - Day 73
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Maths Mastermind - Day 72
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Mathematicians use geometric #topology to study the shape of the universe and everything in it. A #mathematics professor explains how the field explores every possible space across all dimensions, from simple 2D surfaces to intricate higher-dimensional realms.
#geometry #mathsky https://buff.ly/41zmuy2
Maths Mastermind - Day 71
BOOST YOUR BRAIN POWER WITH THIS FUN #MATHEMATICS #PUZZLE !!!
Maths Mastermind - Day 70
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