### Clopen Mic Night – new online maths variety show

The team that brought you the 24 Hour Maths Magic Show last October are at it again, and are planning a semi-regular evening YouTube variety show called Clopen Mic Night, with short segments from a selection of mathematical guests, including comedy, music, demonstrations, magic, puzzles and art, showcasing some top maths communicators and hopefully providing a fun night in. The event is supported by Talking Maths in Public, a network for maths communicators based in the UK, and this first show will take place alongside their 2021 conference event.

It’s called Clopen Mic Night because it’s both an open mic night (in the sense that you’ll see a variety of different people doing different things) and a closed mic night (in that the organisers curate the line-up to ensure a variety of quality acts). If you’ve not encountered the concept of a clopen set, it describes a set that is both open and closed. Usually things are clopen for tedious technical reasons – the empty set and the whole set are both trivially clopen, and most interesting examples crop up in awkwardly-defined sets with non-standard topologies and distance metrics.

The first event is taking place on Thursday 26th August, from 8-9pm, on my YouTube channel, and you can watch along for free, join in with the chat, and drop a coin in our virtual tip bucket if you like what you see. This will hopefully be the first of many such shows (assuming it all goes well!) and for future shows we’ll be looking for acts to join us – anyone participating will also be able to get advice and feedback on their bit in various ways, and we’re hoping it’ll be a chance for people to try out fun new material and showcase the best maths communication has to offer.

For more information about the show, including the lineup for this first event, you can visit the Clopen Mic Night website and sign up for a reminder before each show so you don’t miss it. For updates on future events and how to apply to perform (once that becomes a thing), check the @ClopenMic twitter account.

### 24-hour Maths Magic Show next weekend

Next weekend, a group of maths presenters will be getting together some mathematicians, magicians and other cool people to put on a 24-hour long online YouTube mathematical magic $x$-stravaganza. Each half-hour will feature a different special guest sharing a mathematical magic trick of some kind, and across the day there’ll be a total of 48 tricks for you to watch and puzzle over.

### I’m streaming digits of π for π day

It’s π eve, and I’ve had a silly idea: I’m going to take the ridiculous website I made to show all the digits of π, and stream it scrolling indefinitely through them over the internet.

Starting at midnight GMT on 2019-03-14, the stream below will start scrolling down through the digits of π:

I had this idea this morning, and it’s running on my desktop PC which I’ll be away from until 8am tomorrow, so I won’t be surprised if something goes wrong.

But if it doesn’t: hooray!

### Katie’s Binary Nails Tutorial – and a puzzle

I’ve just posted my latest YouTube video, in which I explain how to use binary numbers to jazz up your nail varnish:

Alongside this video, I also have an associated puzzle for you to think about.

### John Conway on Numberphile!

Numberphile, the supremum over all YouTube channels, has scored a bit of a coup – Brady has sat down and recorded an interview with the famously Internet-reclusive John Conway.

In this first video (there’s a bonus one linked at the end of this one, and I hope there’ll be more) John talks about his love/hate relationship with his Game of Life.

By the way, I notice from the video’s description that the Mathematical Sciences Research Institute is paying for Numberphile these days. Thanks, MSRI!

### Translate Numberphile, please / Traduisez Numberphile, s’il-vous-plaît / Bitte übersetzen Numberphile…

Numberphile is that cool YouTube channel with the videos about the numbers and the philes. You might remember them from the time they did that ace video about our integer sequence reviews. But if you’re unlucky enough not to understand the English as she is spoke, then that’s no use to you.

But it could be! Chief Numberphile Brady Haran has set up a page asking for translations of the videos, so everyone can enjoy them. As long as you’re fluent in one of the languages for which a video already has subtitles, the process is pretty simple: you download a caption file in one language, translate it into another, and upload it back to the site. And then you’ve done a good deed!