Colm Mulcahy
@cardcolm.bsky.social
Prof Emeritus Spelman College, Adjunct Prof SETU, Ireland. Board Gathering 4 Gardner. Curator Annals of Irish Maths. Author "Mathematical Card Magic" AKP/CRC (2013).
Reposted by Colm Mulcahy
@cardcolm.bsky.social :
arxiv.org/abs/2511.06145
/Extremal poker hand rankings: why the standard 52 card deck and a 3044 card deck are special/
Christopher Williamson
arxiv.org/abs/2511.06145
/Extremal poker hand rankings: why the standard 52 card deck and a 3044 card deck are special/
Christopher Williamson
Extremal poker hand rankings: why the standard 52 card deck and a 3044 card deck are special
We study poker hand rankings in the partially generalised setting of a deck with $r$ ranks, rather than the typical 13 ranks. We provide the hand rankings for all $r$ and observe some interesting phen...
arxiv.org
November 11, 2025 at 4:00 AM
@cardcolm.bsky.social :
arxiv.org/abs/2511.06145
/Extremal poker hand rankings: why the standard 52 card deck and a 3044 card deck are special/
Christopher Williamson
arxiv.org/abs/2511.06145
/Extremal poker hand rankings: why the standard 52 card deck and a 3044 card deck are special/
Christopher Williamson
Reposted by Colm Mulcahy
Heading to Blackpool today with my sister. Hoping we’ll enjoy it more than our great-grandmother did.
November 10, 2025 at 10:34 AM
Heading to Blackpool today with my sister. Hoping we’ll enjoy it more than our great-grandmother did.
Reposted by Colm Mulcahy
'People who exercise are more likely to eat well, not smoke, look after their heart health and have fewer financial stresses. This makes it hard to know which factor is having the biggest effect' ...
Even a few thousand steps a day can reduce your risk of Alzheimer’s – new study
Even modest amounts of walking – as few as 3,000 steps a day – may help protect against Alzheimer’s by reducing harmful tau proteins in the brain.
theconversation.com
November 10, 2025 at 5:23 PM
'People who exercise are more likely to eat well, not smoke, look after their heart health and have fewer financial stresses. This makes it hard to know which factor is having the biggest effect' ...
Reposted by Colm Mulcahy
Early morning walk before sunrise.
November 10, 2025 at 1:57 PM
Early morning walk before sunrise.
Reposted by Colm Mulcahy
Sunset from Neakahnie Mountain, Oregon #Photography #OswaldWest📷
November 11, 2025 at 5:17 AM
Sunset from Neakahnie Mountain, Oregon #Photography #OswaldWest📷
Reposted by Colm Mulcahy
Ways stout and porter are commanding more attention @teamdb.bsky.social
Ways stout and porter are commanding more attention
Stout and porter are currently on trend and, as beer styles go, they’ve been overlooked for far too long. Jessica Mason reports.
www.thedrinksbusiness.com
November 10, 2025 at 10:19 AM
Ways stout and porter are commanding more attention @teamdb.bsky.social
Who said that the Germans don’t have a sense of humour?
This is by the entrance of an office building in Bonn.
This is by the entrance of an office building in Bonn.
November 10, 2025 at 10:26 PM
Who said that the Germans don’t have a sense of humour?
This is by the entrance of an office building in Bonn.
This is by the entrance of an office building in Bonn.
First Bonn walk from bridge(s) and banks to Beethoven.
November 10, 2025 at 10:21 PM
First Bonn walk from bridge(s) and banks to Beethoven.
Great lunch in Bonn. Stuffed cabbage with rich gravy and mash.
Not a vegetable in sight, natürlich:-)
Not a vegetable in sight, natürlich:-)
November 10, 2025 at 10:03 PM
Great lunch in Bonn. Stuffed cabbage with rich gravy and mash.
Not a vegetable in sight, natürlich:-)
Not a vegetable in sight, natürlich:-)
This Wednesday, 12 Nov, at 16:30, I speak in Cologne on "From One, Two, Many, to ABC (or ten reasons why mathematics isn´t as easy as 1,2,3)"
www.mi.uni-koeln.de/main/Alle/Ka...
www.mi.uni-koeln.de/main/Alle/Ka...
Abteilung Mathematik
www.mi.uni-koeln.de
November 10, 2025 at 9:45 PM
This Wednesday, 12 Nov, at 16:30, I speak in Cologne on "From One, Two, Many, to ABC (or ten reasons why mathematics isn´t as easy as 1,2,3)"
www.mi.uni-koeln.de/main/Alle/Ka...
www.mi.uni-koeln.de/main/Alle/Ka...
Reposted by Colm Mulcahy
When taken, quite demanding. Year and location. Playing either game means you're helping train their AI free btw
whentaken.com
whentaken.com
whentaken.com
November 10, 2025 at 9:34 PM
When taken, quite demanding. Year and location. Playing either game means you're helping train their AI free btw
whentaken.com
whentaken.com
Reposted by Colm Mulcahy
Parting words from Michael D as @president.ie
November 10, 2025 at 7:47 PM
Parting words from Michael D as @president.ie
Reposted by Colm Mulcahy
We are proud to support this project and collaborate with others in promoting a clear, anti-racist message in Cork
news.corksafetyalerts.com/cork-mural-s...
#spéirgorm
news.corksafetyalerts.com/cork-mural-s...
#spéirgorm
Cork Mural Sparks Nationwide Conversation on Immigration and Irish Identity
Cork students paint 50m mural quoting James Connolly on Sullivan's Quay, drawing half a million views and igniting conversation on immigration and Irish identity.
news.corksafetyalerts.com
November 4, 2025 at 12:15 PM
We are proud to support this project and collaborate with others in promoting a clear, anti-racist message in Cork
news.corksafetyalerts.com/cork-mural-s...
#spéirgorm
news.corksafetyalerts.com/cork-mural-s...
#spéirgorm
Ha! Thanks.
When taken, quite demanding. Year and location. Playing either game means you're helping train their AI free btw
whentaken.com
whentaken.com
whentaken.com
November 10, 2025 at 9:37 PM
Ha! Thanks.
This Thursday, catch me at Berliner Mathematische Gesellschaft e.V.
www.math.berlin/veranstaltun...
BMG-Tag am 13. November 2025
www.math.berlin/veranstaltun...
BMG-Tag am 13. November 2025
BMG-Tag 2025: Magische Mathematik !? | Berliner Mathematische Gesellschaft e.V.
Ankündigung und später auch Dokumentation des 11. BMG-Tags
www.math.berlin
November 10, 2025 at 9:36 PM
This Thursday, catch me at Berliner Mathematische Gesellschaft e.V.
www.math.berlin/veranstaltun...
BMG-Tag am 13. November 2025
www.math.berlin/veranstaltun...
BMG-Tag am 13. November 2025
Reposted by Colm Mulcahy
PHOTO OF THE DAY. England goalkeeper Gordon Banks catches a dog (1965). 📷 Chris Morphet
November 10, 2025 at 9:40 AM
PHOTO OF THE DAY. England goalkeeper Gordon Banks catches a dog (1965). 📷 Chris Morphet
Damn you Dave! I may have to add this to my daily bad habits!! I didn’t to great the first time.
Wish there was a musical equivalent.
Wish there was a musical equivalent.
My friend showed me this daily web game: Which Year? It shows five photos, and you have to guess the year for each one. You can get four free digits with no penalty, but each digit can be used only once (in other words, you can get the thousands, hundreds, tens, or ones each only once). whichyr.com
Which Year - Photo Year Guessing Game
Guess the year real-world photos were taken. Test your history knowledge with a daily challenge featuring a new set of photos each day.
whichyr.com
November 10, 2025 at 9:24 PM
Damn you Dave! I may have to add this to my daily bad habits!! I didn’t to great the first time.
Wish there was a musical equivalent.
Wish there was a musical equivalent.
Reposted by Colm Mulcahy
My friend showed me this daily web game: Which Year? It shows five photos, and you have to guess the year for each one. You can get four free digits with no penalty, but each digit can be used only once (in other words, you can get the thousands, hundreds, tens, or ones each only once). whichyr.com
Which Year - Photo Year Guessing Game
Guess the year real-world photos were taken. Test your history knowledge with a daily challenge featuring a new set of photos each day.
whichyr.com
November 10, 2025 at 8:39 PM
My friend showed me this daily web game: Which Year? It shows five photos, and you have to guess the year for each one. You can get four free digits with no penalty, but each digit can be used only once (in other words, you can get the thousands, hundreds, tens, or ones each only once). whichyr.com
Reposted by Colm Mulcahy
Stepped off train in Köln on platform 1 and this view greeted me.
November 10, 2025 at 9:28 AM
Stepped off train in Köln on platform 1 and this view greeted me.
Reposted by Colm Mulcahy
Nice to see the MSM finally paying attention to my skeets
November 10, 2025 at 7:14 PM
Nice to see the MSM finally paying attention to my skeets
Reposted by Colm Mulcahy
The Manuscript of the Week is RIA MS 23 P 7, Annals of the Four Masters. Two full sets of the annals of Irish history from A.M. 2242 - A.D. 1616 were completed by Franciscan scholars, now known as the Four Masters.
November 10, 2025 at 9:48 AM
The Manuscript of the Week is RIA MS 23 P 7, Annals of the Four Masters. Two full sets of the annals of Irish history from A.M. 2242 - A.D. 1616 were completed by Franciscan scholars, now known as the Four Masters.
Reposted by Colm Mulcahy
Trump rumoured to be consulting Albert Reynolds using a Oui Ja Board for advice on foreign leaders using defamation law against UK media...
November 10, 2025 at 4:28 PM
Trump rumoured to be consulting Albert Reynolds using a Oui Ja Board for advice on foreign leaders using defamation law against UK media...
Reposted by Colm Mulcahy
The sense of world mastery I have after even one very straightforward achievement in the realm of working a printer/scanner is pretty much unmatched.
November 10, 2025 at 9:53 AM
The sense of world mastery I have after even one very straightforward achievement in the realm of working a printer/scanner is pretty much unmatched.
Reposted by Colm Mulcahy
BBC reveals next DG
November 10, 2025 at 10:23 AM
BBC reveals next DG
Reposted by Colm Mulcahy
FYI- if one of your Thanksgiving recipes calls for caramelized onions, start those today.
November 9, 2025 at 1:57 PM
FYI- if one of your Thanksgiving recipes calls for caramelized onions, start those today.