The Carnival of Mathematics is a monthly blogging round up hosted by a different blog each month. The Aperiodical will be taking responsibility for organising a host each month, and links to the monthly posts will be added here. To volunteer to host a forthcoming Carnival (see below for months needing a host), please contact Katie.

The Carnival of Mathematics accepts any mathematics-related blog posts, YouTube videos or other online content posted during the month: explanations of serious mathematics, puzzles, writing about mathematics education, mathematical anecdotes, refutations of bad mathematics, applications, reviews, etc. Sufficiently mathematized portions of other disciplines are also acceptable. An FAQ can be found at the bottom of this page.

Current:is hosted by Karen at Reflections and Tangents.Carnival 219

Next: Carnival of Maths 220will be hosted by Nathalie at Infinitely Irrational, and submissions will close on1st October.

Click here to submit an item to Carnival 220

## Future Carnival organisers:

**Carnival 220** – October 2023: hosted by Nathalie at Infinitely Irrational

**Carnival 221** – November 2023: hosted by Suzza at Beauty of Mathematics

**Carnival** **222** – December 2023: hosted by John D Cook

**Carnival 223** – January 2024: hosted by George Shakan at Data Science and Math

**Carnival 224** – February 2024: hosted by Stephen at Cavmaths

*We’re always looking for more Carnival organisers. If you’re interested, email Ioanna.*

## Previous Carnival of Mathematics posts:

**Carnival 219** – September 2023: hosted by Karen at Reflections and Tangents

**– August 2023: hosted by Tony at Tony’s Maths Blog**

Carnival 218Carnival 218

**– July 2023: hosted by Vaibhav at DoubleRoot**

Carnival 217Carnival 217

**– June 2023: hosted by Eddie at Eddie’s Math and Calculator Blog**

Carnival 216Carnival 216

**– May 2023: hosted by Cassandra at Cassandra Lee Yieng’s Blog**

Carnival 215Carnival 215

**– April 2023: hosted by Robin at Theorem of the Day**

**Carnival 214****– March 2023: hosted by Sam at SamHartburn.co.uk**

Carnival 213Carnival 213

**– February 2023: hosted by Ioanna at IoannaGeorgiou.com**

Carnival 212Carnival 212

**– December 2022/January 2023: hosted by Ganit Charcha**

Carnival 211Carnival 211

**– November 2022: hosted by Katie, here at The Aperiodical**

Carnival 210Carnival 210

**– October 2022: hosted by Jeremy at Math Intersect Programming**

Carnival 209Carnival 209

**– September 2022: hosted by James at AlephJamesA**

Carnival 208Carnival 208

**– August 2022: hosted by Sam at SamHartburn.co.uk**

Carnival 207Carnival 207

**– July 2022: hosted by Stormy at Storm Bear World**

Carnival 206Carnival 206

**– June 2022: hosted by Rob at Rob Eby’s Math Blog**

Carnival 205Carnival 205

**– May 2022: hosted by Sophie the Mathmo**

Carnival 204Carnival 204

**– April 2022: hosted by Ben at Math Off The Grid**

Carnival 203Carnival 203

**– March 2022: hosted by Sophia at Fractal Kitty**

CarnivalCarnival

**202****– January/February 2022: hosted at Ganit Charcha**

Carnival 201Carnival 201

**– December 2021: hosted at The Aperiodical**

Carnival 200Carnival 200

**– November 2021: hosted by Vaibhav at DoubleRoot**

Carnival 199Carnival 199

**– October 2021: hosted by Kartik at Comfortably Numbered**

Carnival 198Carnival 198

**– September 2021: hosted by Jeremy at Math ∩ Programming**

Carnival 197Carnival 197

**– August 2021: hosted by Peter at Thatsmaths**

Carnival 196Carnival 196

**– July 2021: hosted by Stormy at Storm Bear World**

Carnival 195Carnival 195

**– June 2021: hosted by Mike at Walking Randomly**

**Carnival 194****– May 2021: hosted by Ben at Math Off The Grid**

Carnival 193Carnival 193

**– April 2021: hosted by Eddie at Eddie’s Math & Calculator Blog**

Carnival 192Carnival 192

**– March 2021: hosted by Sophia at Fractal Kitty**

Carnival 191Carnival 191

**– February 2021: hosted by Sophie the Mathmo**

Carnival 190Carnival 190

**– January 2021: hosted by the team at Ganit Charcha**

Carnival 189Carnival 189

**– December 2020: hosted by Sam Hartburn**

Carnival 188Carnival 188

**– November 2020: hosted by James at AlephJamesA**

Carnival 187Carnival 187

**– October 2020: hosted by Abhik Jain**

Carnival 186Carnival 186

**– September 2020: Mark at Apud Nimbum**

Carnival 185Carnival 185

**– August 2020: Tom at Tom Rocks Maths**

Carnival 184Carnival 184

**– July 2020: Fiona at Famous Mathematicians**

Carnival 183Carnival 183

**– June 2020: Zoe at ZoeLGriffiths.co.uk**

Carnival 182Carnival 182

**– May 2020: Ben at Math Off The Grid**

Carnival 181Carnival 181

**– April 2020: Kevin at kpknudson.com**

Carnival 180Carnival 180

**– March 2020: Paul at The Aperiodical**

Carnival 179Carnival 179

**– February 2020: Stormy at Storm Bear World**

Carnival 178Carnival 178

**– December 2019 & January 2020: the team at Ganit Charcha**

Carnival 176/177Carnival 176/177

**– November 2019: Pat & Steve at Woolly Thoughts & Mental Blocks**

Carnival 175Carnival 175

**– October 2019: Katie at aperiodical.com**

Carnival 174Carnival 174

**– September 2019: Peter at PeterKrautzberger.org**

Carnival 173Carnival 173

**– August 2019: Cassandra at Cassandra Lee Yieng’s blog**

**Carnival 172****– July 2019: William at MathTuition88**

Carnival 171Carnival 171

**– June 2019: Jim at Mathematical Enchantments**

Carnival 170Carnival 170

**– May 2019: Ari at Gereshes**

Carnival 169Carnival 169

**– April 2019: Ben at Math Off The Grid**

Carnival 168Carnival 168

**– March 2019: Tom at Tom Rocks Maths**

Carnival 167Carnival 167

**– February 2019: Ben at Math With Bad Drawings**

Carnival 166Carnival 166

**– January 2019: the team at Ganit Charcha**

Carnival 165Carnival 165

**– December 2018: the team at Life Through a Mathematician’s Eyes**

Carnival 164Carnival 164

**– November 2018: Elias at The Math Section**

Carnival 163Carnival 163

**– October 2018: the team at Chalkdust Magazine**

Carnival 162Carnival 162

**– September 2018: Alex at CoDiMa**

**Carnival 161****– August 2018: Robin at Theorem of the Day**

Carnival 160Carnival 160

**– July 2018: Kartik at Comfortably Numbered**

Carnival 159Carnival 159

**Carnival 158 –**June 2018: Paul at The Aperiodical

**Carnival 157**– April 2018: Becky at Lines, Curves, Spirals

**– March 2018: Robin at Theorem Of The Day**

Carnival 156

Carnival 156

**– February 2018: Ben at Math Off The Grid**

Carnival 155

Carnival 155

**– January 2018: Rachel at The Math Citadel**

Carnival 154

Carnival 154

**Carnival 153**– December 2018: the team at Ganit Charcha

**– November 2017: TD and Matthew at Chalkdust Magazine**

Carnival 152

Carnival 152

**– October 2017: Frederick at White Group Mathematics**

Carnival 151Carnival 151

**– September 2017: Alexander at CoDiMa**

Carnival 150Carnival 150

**– August 2017: Mel at Just Maths**

Carnival 149Carnival 149

**– July 2017: Kartik at Comfortably Numbered**

Carnival 148Carnival 148

**– June 2017: Lucy at Cambridge Mathematics**

Carnival 147Carnival 147

**– May 2017: Peter at peterkrautzberger.org**

Carnival 146Carnival 146

**– April 2017: Katie at The Aperiodical**

Carnival 145Carnival 145

**– March 2017: Frederick at White Group Mathematics**

Carnival 144Carnival 144

**– February 2017:**

Carnival 143Carnival 143

**Robin at Theorem of the Day**

**– January 2017: Manan at Math Misery**

Carnival 142Carnival 142

**– December/January 2017: the team at Ganit Charcha**

Carnival 141Carnival 141

**– November 2016: Tom at Mathematics and Coding**

Carnival 140Carnival 140

**– October 2016:**

Carnival 139Carnival 139

**Manjil at Gonit Sora**

**– September 2016: Yen Duong at Baking and Math**

Carnival 138Carnival 138

**– August 2016:**

Carnival 1Carnival 1

**37****Evelyn and Anna at the AMS Blog on Maths Blogs**

**July 2016:**

CarnivalCarnival

**136 –****Manan at Math Misery**

**– June 2016: Gaurish at Gaurish4Math**

CarnivalCarnival

**135****– May 2016: Kartik at Comfortably Numbered**

CarnivalCarnival

**134****–**

CarnivalCarnival

**133****April 2016: Matthew at Chalkdust Magazine**

**– March 2016: Brent at The Math Less Travelled**

CarnivalCarnival

**132****– February 2016: Katie at The Aperiodical**

CarnivalCarnival

**131****– January 2016: Brian at Bit Player**

CarnivalCarnival

**130****December 2015: the team at Ganit Charcha**

**–**

Carnival 129Carnival 129

**– November 2015: Mike at Walking Randomly**

Carnival 128Carnival 128

**– October 2015: Tom at Mathematics and Coding**

Carnival 127Carnival 127

**– September 2015:**

Carnival 126Carnival 126

**Stephen at Cavmaths**

**– August 2015: Nick at Data Genetics**

Carnival 125Carnival 125

**– July 2015: Manjil at Gonit Sora**

Carnival 124Carnival 124

**– June 2015: David at Mathematical Mystery Tour, Part 1 and Part 2**

Carnival 123Carnival 123

**– May 2015: Ed at Solve My Maths**

Carnival 122Carnival 122

**– April 2015: Ioana at Life Through a Mathematician’s Eyes**

Carnival 121Carnival 121

**– March 2015: Manan at Math Misery**

Carnival 120Carnival 120

**February 2015: Frederick at White Group Mathematics**

Carnival 119 –Carnival 119 –

**– January 2015: Andrew at AndrewT.net**

**Carnival 118****– December 2014: Rachel at Plus Magazine**

Carnival 117Carnival 117

**– November 2014: Stephen at CavMaths**

CC

**arnival 116****– October 2014: William at MathTuition88**

Carnival 115Carnival 115

**– September 2014: Murray at SquareCirclez**

Carnival 114Carnival 114

**– August 2014: Mike at Walking Randomly**

Carnival 113Carnival 113

**– July 2014: Robin at Theorem of the Day**

Carnival 112Carnival 112

**– June 2014: Peter at Boole’s Rings**

Carnival 111Carnival 111

**– May 2014: Colin at Flying Colours Maths**

Carnival 110Carnival 110

**– April 2014: Tony at Tony’s Maths Blog**

Carnival 109Carnival 109

**– March 2014: John at Math Hombre**

Carnival 108Carnival 108

**– February 2014: Frederick at White Group Mathematics**

Carnival 107Carnival 107

**– January 2014: Katie at Blackboard Bold**

Carnival 106Carnival 106

**– December 2013: Oluwasanya at Mathemazier**

Carnival 105Carnival 105

**– November 2013: Shecky R at Math-Frolic**

Carnival 104Carnival 104

**– October 2013: Evelyn at Roots of Unity**

Carnival 103Carnival 103

**– September 2013: Michelle at My Summation**

Carnival 102Carnival 102

**– August 2013: Aperiodical team, at The Aperiodical**

Carnival 101

Carnival 101

**– July 2013: Richard Elwes at Simple City**

Carnival 100Carnival 100

**– June 2013: Sol at Wild About Math**

Carnival 99

Carnival 99

**– May 2013: Andrew at andrewt.net/blog**

Carnival

Carnival

**98****– April 2013: Colin at Flying Colours Maths**

Carnival 97Carnival 97

**– March 2013: Sue at Math Mama Writes.**

Carnival 96Carnival 96

**– February 2013: Jorge at Maths Fact**

Carnival 95

Carnival 95

**– January 2013: Paul at The Aperiodical**

Carnival 94

Carnival 94

**December 2012: Tosin at X in Vogue**

Carnival 93 –

Carnival 93 –

**November 2012: Frederick at White Group Mathematics**

**Carnival 92 –****– October 2012: Owen at Matheminutes**

Carnival 91Carnival 91

**September 2012: Mike at Walking Randomly**

Carnival 90 –Carnival 90 –

**– August 2012: Katie at The Aperiodical**

Carnival 89Carnival 89

**– July 2012: at cp’s mathem-o-blog**

Carnival 88Carnival 88

**– June 2012: John at Random Walks**

Carnival 87Carnival 87

**– May 2012: Brent at The Math Less Travelled**

Carnival 86

Carnival 86

**– April 2012: Peter at Travels in a Mathematical World**

Carnival 85

Carnival 85

**– December 2011: Guillermo at Mathematics and Multimedia**

Carnival 84

Carnival 84

**– November 2011: Karyn at Teach Beside Me**

Carnival 83

Carnival 83

**Carnival 82**– October 2011: at the Vedic Maths Forum Blog

**Carnival 81**– September 2011: Sol at Wild About Math

**Carnival 80**– August 2011: Mike at Walking Randomly

**Carnival 79**– July 2011: John at The Endeavour

**Carnival 78**– June 2011: at JimWilder.com

**Carnival 77**– May 2011: Fëanor at Jost A Mon

**Carnival 76**– April 2011: Mike at Walking Randomly

**Carnival 75**– March 2011: Daniel Colquitt

**Carnival 74**– February 2011: Mike at Walking Randomly

**Carnival 73**– January 2011: Mike at Walking Randomly

**Carnival 72**– December 2010: Batman at Three Sixty

**Carnival 71**– November 2010: at Theorem of the Day

**Carnival 70**– October 2010: Daniel Colquitt (link broken; reposted 31/03/2012 at Mathematical Musings Tumblr)

**Carnival 69**– September 2010: Jonathan at JD2718

**Carnival 68**– August 2010: at Plus Magazine

**Carnival 67**– July 2010: Peter at Travels in a Mathematical World

**Carnival 66**– June 2010: Sol at Wild About Math

**Carnival 65**– May 2010: Edmund at Maxwell’s Demon

**Carnival 64**– April 2010: Mike at Walking Randomly

**Carnival 63**– March 2010: Dan at Math Recreation

**Carnival 62**– February 2010: John at The Endeavour

**Carnival 61**– January 2010: Mike at Walking Randomly

**Carnival 60**– December 2009: Nick at Sum Idiot

**Carnival 59**– November 2009: Jason at The Number Warrior

**Carnival 58**– September 2009: Mike at Walking Randomly

**Carnival 57**– September 2009: Batman at Three Sixty

**Carnival 56**– August 2009: Rod Carvalho

**Carnival 55**– July 2009: at Sowerby Maths (link broken)

**Carnival 54**– July 2009: Todd and Vishal at Topological Musings

**Carnival 53**– June 2009: Brent at The Math Less Travelled

**Carnival 52**– May 2009: Jason at The Number Warrior

**Carnival 51**– April 2009: Murray at SquareCircleZ

**Carnival 50**– February 2009: John at The Endeavour

**Carnival 49**– February 2009: Batman at Three Sixty

**Carnival 48**– January 2009: yanzhang at Concrete Nonsense

**Carnival 47**– January 2009: Jonathan at JD2718

**Carnival 46**– Deceber 2008: Mike at Walking Randomly

**Carnival 45**– December 2008: at TCM Technology Blog (private link)

**Carnival 44**– November 2008: Edmund at Maxwell’s Demon

**Carnival 43**– November 2008: Jason at The Number Warrior

**Carnival 42**– October 2008: John at The Endeavour

**Carnival 41**– October 2008: Batman at Three Sixty

**Carnival 40**– September 2008: Barry at Staring at Empty Pages

**Carnival 39**– August 2008: A at It’s the Thought That Counts

**Carnival 38**– August 2008: at CatSynth

**Carnival 37**– July 2008: Ian at Logic Nest

**Carnival 36**– July 2008: Charles at Rigorous Trivialities

**Carnival 35**– June 2008: at CatSynth

**Carnival 34**– May 2008: Batman at Three Sixty

**Carnival 33**– May 2008: Mike at Walking Randomly

**Carnival 32**– May 2008: at TCM Technology Blog (private link)

**Carnival 31**– April 2008: Jeffrey at Recursivity

**Carnival 30**– April 2008: Jason at The Number Warrior

**Carnival 29**– March 2008: Jordan at Quomodocumque

**Carnival 28**– March 2008: Tyler and Foxy at Tyler and Foxy’s Scientific and Mathematical Adventure Land

**Carnival 27**– February 2008: Jonathan at JD2718

**Carnival 26**– February 2008: Batman at Three Sixty

**– January 2008: Mike at Walking Randomly**

Carnival 25

Carnival 25

**– January 2008: Walt at Ars Mathematica**

Carnival 24

Carnival 24

**– December 2007: Brent at The Math Less Travelled**

Carnival 23

Carnival 23

**– December 2007: Sol at Wild About Math**

Carnival 22

Carnival 22

**– December 2007: Ben at Secret Blogging Seminar**

Carnival 21

Carnival 21

**Carnival 20**– November 2007: Murray at SquareCircleZ

**– October 2007: Mark at Good Math, Bad Math**

Carnival 19

Carnival 19

**– October 2007: Jonathan at JD2718**

Carnival 18

Carnival 18

**– Septmber 2007: Dave at MathNotations**

Carnival 17

Carnival 17

**– September 2007: Kurt at Learning Computation**

Carnival 16

Carnival 16

**Carnival 15**– August 2007: John at JohnKemeny.com

**Carnival 14**– August 2007: Vlorbik at MathEdZineBlog

**– July 2007: Polymath at Polymathematics**

Carnival 13

Carnival 13

**Carnival 12**– July 2007: at the Vedic Maths Forum Blog

**Carnival 11**– June 2007: Pi Guy at Grey Matters

**Carnival 10**– June 2007: Dave at MathNotations

**Carnival 9**– June 2007: Jonathan at JD2718

**Carnival 8**– May 2007: Suresh at Geomblog

**Carnival 7**– May 2007: Arunn at Nonoscience

**Carnival 6**– April 2007: Graeme at Modulo Errors

**Carnival 5**– April 2007: Charles at Science and Reason

**Carnival 4 –**March 2007: Jason at EvolutionBlog

**Carnival 3**– March 2007: Michi at Michi’s Blog

**Carnival 2**– February 2007: Mark at Good Math, Bad Math (Archived page)

**Carnival 1**– February 2007: Alon at Abstract Nonsense

**Carnival of Mathematics FAQ:**

### When are the carnivals published?

The Carnival of Mathematics gets published during the first week of the month. Math Teachers at Play, another maths carnival organised by Denise at LetsPlayMath, gets published during the third week.

### I would like to host a carnival at my blog. What should I do?

Check the list of upcoming Carnival hosts above, and then contact Katie to let her know you’re interested.

### Who does the admin for the Carnival?

The Carnival of Mathematics is currently being organised by the Aperiodical. The Aperiodical will be taking responsibility for organising a host each month, and links to the monthly posts will be added here.

### I’ve found a cool maths article that someone else has written. Can I submit it to the carnival?

Yes, but in an ideal world it will be a recent post and should have never been submitted to one of the carnivals before. The best way to be sure of this, if the post is not your own, is to send in only something published since the last edition of the carnival.

### Who decides what gets included in a carnival and what doesn’t?

The carnival hosts. The carnival is just a guest on the host’s blog, and so what each host writes is entirely up to him or her. In general, most carnival hosts will include almost everything that is submitted to them and a bit more besides. However, if they choose NOT to link to something, then so be it.

### Will the Carnival of Mathematics take articles on basic maths?

Yes — everything from kindergarten to cutting edge research is fair game for the Carnival of Math. Basic mathematics can be submitted to either the Carnival of Mathematics, or Math Teachers At Play (as described above), but advanced maths should generally be submitted only to the Carnival of Math.

### Do you accept articles from subjects such as computer science or physics?

As long as there is a reasonable amount of maths content, then yes.

### Is there anything else I need to do, besides submitting my article?

No, there is nothing else you have to do. When the carnival is published, however, you may want to post a link to it on your blog. The carnival host will appreciate your support, and your readers will enjoy a chance to browse what other math bloggers have written.

### Does the carnival have a twitter feed?

Yes. It can be found at @CarnivalOfMath.

Here’s the missing carnival 7, via the Internet archive: http://web.archive.org/web/20110716094553/http://www.nonoscience.info/2007/05/04/carnival-of-mathematics-edition-7/

Thanks!

I had a conversation with Daniel Colquitt on Twitter about #70 and #75. He didn’t realise he had deleted the posts but had just meant to deactivate the blog account. He’s now found the posts and will rehost them.

Ah, as soon as I posted that he’s reposted #70 but #75 appears to be gone for good (and not at archive.org or a Google cache – where else might it be?).

The 56th installment was actually hosted on my blog, not on Sue’s. In any case, thanks for compiling this list.

Rod, thanks for letting us know. I logged in to sort that out but either Christian or Katie has already made the change. The error was certainly mine.

Any chance you want to host the Carnival again? We’re looking for hosts from March 2013 onwards.

There’s nothing here about how to submit. I’ll send to Katie?

There’s a big huge link at the top of the page saying “Click here to submit an item to Carnival 94”.

Here it is again: Click here to submit an item to Carnival 94

Ok, I’m officially embarrassed. (I wonder if I’m blind to blue text when I’m scanning?)

Hi, although #99 is published it still says “Click here to submit an item to Carnival 99” up above. I clicked there and submitted something for #100. Will #100 find it, or has it gone down into a #99 space where no-one is looking?

Whoops! Yes, it’s in the queue for #100. Thanks for alerting us to the error.