Curious what my mathematician & math educator friends think of the use of AND on this sign...
Wondering if dogs OR alcohol are allowed on the beach, just not at the same time?
🤪 🤷‍♀️

#iTeachMath #MathChat #MathsChat

Someone has pointed out, quite rightly, that I really should tag @standupmaths when I mention a video that he has made.

I'm not sure appearing in a video counts as a connection for an Erdős number, much as people might hope it might.

So ... the monostable (or self-righting) tetrahedron:

https://www.youtube.com/watch?v=b6S5gHjuN48

#Maths #Math #MathsChat #MathChat #MTBoS

I'm doing some of my "follow the instructions for a change" #Sashiko, and came upon a bit that I think means I can't do everything that's left without a lot of stopping and starting.

Then I realised I have an actual graph theorist in the house who might see something I'd missed.

So I checked with @ColinTheMathmo, and he did spot something I'd missed, but it confirmed the impossibility.

I'll have to fudge it...

#MathsChat #GraphTheory #HandEmbroidery

Every polynomial with real coefficients factors into linear and quadratic terms.

How much machinery is needed to show this?

If it crosses the X-axis then it has a linear term.

If it doesn't cross the X-axis then it is of even degree, and the roots come in complex conjugate pairs.

What the minimum needed to see this?

#maths #math
#algebra #ComplexNumbers
#MathsChat #MathChat

I've been thinking about this for ages, but never had the time to craft the words around it.

People keep saying that "Maths should be fun" ... and I push back with "It should be engaging ... 'fun' is a different thing.

So @rakhichawla has posted pretty much exactly this, but better than I ever could.

I'm copying it here with permission.

Please read this, then as it says at the end ... let's have a deeper conversation about this ...

1/n

(PS: I'd love this to get boosted to get outside my bubble ... you're all amazing, but there will be other opinions, and other thoughts that could be helpful or valuable)

Hashtags: #MathEd #MathsEd #MathEdChat #MathsEdChat #MathChat #MathsChat #MTBoS #TMWYK

Fermat conjectured that for \(n\) a non-negative integer, all numbers of the form \(2^{2^n}+1\) are prime.

Was there ever a worse conjecture in maths than that?

#Maths #Math
#MathsEd #MathEd
#MathsChat #MathChat
#Fermat #Conjecture
#Primes #FermatPrimes

Some time ago ... (A month!) ... there was a thread on Twitter that I think should be shared here. I've been trying to extract and post it semi-automatically, but Twitter just makes it damn near impossible.

So I'm copying it "by hand"

Here's a chart of the full conversation:

https://www.solipsys.co.uk/Chartter/1856750472826085652.svg

Here's the head of the conversation:

https://x.com/TweetingCynical/status/1856750459110986045

#MTBoS #TMWYK
#MathChat #MathsChat
#MathEd #MathEdChat
#MathsEd #MathsEdChat

I will occasionally update the chart of *this* conversation, and it will be here:

https://www.solipsys.co.uk/Chartodon/TeachingTellingTheTime.svg

Here is the content ...

Some fun math "switcheroos":
A% of B = B% of A
log_b(a) = 1/log_a(b)
Sin(A) = Cos(B) in right triangle

Do you have any others in this style? Would love to add more to this list.
{Was awake in the night thinking about the middle one, based on Q posed in a FB group}

#MTBoS #iTeachMath #MathChat #MathsChat