Arctangent Puns

The 2022 lineup is absolutely insane; Imperial Triumphant, Frontierer, The Fall of Troy, Opeth, Mass of the Fermenting Dregs, The Locust, Oranssi Pazuzu, and many other killer bands. I’d love to go, but due to cost and location/travel difficulties(I live in the U.S) I might have to settle for Maryland Deathfest in May.

Hi there,

I'd love to go to the ArcTanGent festival next August (the line up is insane), but coming from Germany and not knowing anyone who would accompany me, I'd love to travel there with others or join a group who is already there. Preferably I'd like to find people to share a tent with, so I don't need to bring one all the way just for myself. (I'd pay my share for the lot etc. of course and buy you some drinks.)

Feel free to write me a dm if you're looking for travel/festival companions, too. I'd also welcome advice from people who've been to said festival or other festivals at the same location(Fernhill Farm), on the best way to get there without your own car or what else to look out for.

Thanks!

So Arctangent festival got cancelled. My pal and I are still heading to Bristol anyway as we've accommodation booked. I've had a quick search for things to do, but nothing is really grabbing me. Looking for decent bars, craft beer tap rooms, maybe a good rock bar or jazz club? Also for stuff during the day. Who knows.. Any suggestions would be greatly appreciated.

[US-NJ] WTS: SMKeyboards TKL, Pink Acrylic Design 02 65%, KUL-87 Custom, Keysets, Switches, Wrist Rests

I am selling several items which I will outline below. Please shoot me a pm if you are interested in anything. All prices include CONUS shipping.

https://imgur.com/a/s3UNBgZ

Arctangent Design02 built with lubed NK Creams and GMK stabilizers and a KBD67 PCB. The board was not used much as I really don't like Linears all that much and I have really just been using my 60% collection lately. I am looking to get $225 shipped SOLD

KUL87 w/ MX Blacks and a Tai Hao Keyset. I custom painted this as you can see in the photos. It is a color shift purple / green with a design painted on the back (The word bubble is just vinyl but the design is painted on). There are some paint blemishes but overall it is in great condition. For this keyboard I am looking to get $60 shipped

I am selling my SM keyboards TKL. It is transparent purple and teal with a copper plate. It has a Hineybush 87a PCB and is finished off with Kailh Box Blacks. It has GMK stabilizers, but keep in mind the spacebar stabilizer should probably be replaced. It works fine but it a bit sluggish and quite noisy currently. The tabs holding the bar in place broke so I had to replace them with a dab of hot glue as pictured. A new stabilizer would fix this issue. If you have any questions feel free to ask. $130 shipped

The wrist rests were all made by me and are priced as follows:

TKL Teal / Purple Holographic: 14.00" Excellent condition, no blemish's on the top, some blemishes on the bottom, feet come pre mounted. Looking to get $35 shipped

60% Supreme Glitter Blurple: 11.75" Excellent condition, no blemish's on the top, with some defects and sanded edges on the bottom. Will come with feet that are not attached. Looking to get $35 shipped

60% Red Poker: 11.75" Excellent Condition, no visible blemishes. Will come with feet that are not attached. Looking for $50 shipped

I am selling an EnjoyPBT Valentine set. It has no shine and was barely used. The set is complete. I am looking to get $50 shipped SOLD

I am selling a blank white NP PBT 124 Key Set. This is brand new and never used. Looking for $20 shipped

I am also selling 61 MX Silent Black stems in Zeal housings, 72g weight. Super smooth and very worn in. They are luebed as well but could probably use a re lub. Looking to get $45 shipped

I heard rumours about Opeth letting people vote on what song to play (so I'd imagine that means they'll play black rose immortal) and I really want to see it as it'll be the first time they ever play it live, but I don't want to buy the tickets and not even be able to go

Link to video: https://www.youtube.com/watch?v=deVjjcz8DoQ

- Voron 0.1 with bowden configuration (note the remixed motor panel w/ bowden cutout for the Clockwork)

I had a blast building it... I feel a 2.4 coming in my future...

I have just finished writing a math paper about arctangent formulas for π. I believe I have proved that there are arbitrarily quickly converging arctangent formulas for π, as well as a method for getting them. Here is the link to the paper on overleaf: https://www.overleaf.com/read/wvvhpmxzdpwp. Here is a link to the Wikipedia page about arctangent formulas for π: https://en.wikipedia.org/wiki/Machin-like_formula. Any thoughts about my paper would be appreciated. Please let me know if it is correct or not or if it is new.

Thanks!

Hello all!

Hope everyone is having a nice day. Offering a 65% stacked acrylic case, called the Design02, that I designed myself trying to reimagine what a stacked acrylic case can look like. Here is a link to my Instagram where I post every now and then some updates or some recent cases made, you can also find some more pictures of past cases made here on one of the pages of my website. A general link to the website can be found below here. Any questions please let me know, either in the comments, Reddit DMs, or Instagram DMs.

https://arctangentkb.com/

Disclaimer: Due to Shopify limiting me in the number of "variants" of a product I can have, I had to split the plates and acrylic layers into two different products, so if anyone is interested please remember to pick both the case and plate from the separate product pages.

Build stream also featured from Alexotos on Twitch, linked here, if you're interested in the build process.

Also here is an imgur link to just a couple pictures of cases I have done in the past in some of the colors that I have done so far. https://imgur.com/a/FLghnhr

Board Information

• 65% Layout, arrow-key blocker
• Supports ISO, split backspace, split left shift, and stepped CAPs
• 6.5 degree typing angle
• Compatible PCBs include KBD67 rev 2, KBD67 v2 mkii (solder/hotswap), Savage65, Instant65
• Hardware includes 0.25" Dia. solid brass standoffs, low-profile top screws, standard-profile bottom screws, hex-keys, rubber feet

Customization

• 20 colors of matte/frosted acrylic
• 4 metal plate materials (Aluminum, Stainless Steel, Brass, Copper) each having 3 different finishes to them (vibration, brushed, sandblasted) and FR4 plates
• Choice of adding some accent layers, and if you would like to keep the main colors of the accent layers to have as spares
• Offering plate foam from stupidfish designs

Pricing

Due to the amount of customizability I wish to offer, it is hard to give a general statement of price, so I can offer the range from the cheapest combination to the most expensive combination (with some details of course) and hopefully that can suffice to give a general idea.

• Clear frosted Acrylic + FR4 Plate + No plate foam = $190 + shipping
• Any color + Sandblasted Copper plate + plate foam = $295 + shipping

Every othe

Hello all!

Welcome to the Interest Check for the Design03! Arctangent back with an adaption to my previous release of a sculpted stacked acrylic case, the Design02 (65%). Thank you so much for the interest in the case, I will cut to the chase and throw some information your way.

Compatible PCBs: ProjectKeyboards, Switch Couture X Mechlovin Adelais, SneakBox Alice, and other similar

Typing angle: 6.5 degrees

Mounts: 1/4" Diameter solid brass standoffs, low profile crews for top mounts, standard profile for bottom mounts.

Form link:

https://forms.gle/dZfM1MrPBuj4k4Sz7

Imgur Album link to some further photos:

https://imgur.com/a/pWEK7UC

Updates and other posts can be found on my Instagram:

https://www.instagram.com/arctangent_kb/

Also check out my website where the sale will go live, or you can also pick up a Design02 for yourself if you're interested:

https://arctangentkb.com/

Please post any questions you may also have here, or feel free to DM me!

Thank you!

Looking forward to Arctangent 2021. This will be my first time. What's the transport situation like? Are there late shuttle buses back to Bristol? I'm not from these parts 🤠

let f(x) = 4sqrt(6) / (sqrt(24)x^(2) + 4sqrt(6)). Calculate integral from -sqrt(2) to 0 of f(x)

My solution:

f(x) = 4sqrt(6)/sqrt(24) * 1/(x^(2) + 4sqrt(6)/sqrt(24)).

we know 4sqrt(6)/sqrt(24)) = 4sqrt(23)/sqrt(2^(3) * 3) = 4sqrt(1/2^(2)) = 4(1/2) = 4/2 = 2 so

f(x) = 2/(x^(2) + 2) = 2 * 1/(x^(2) + sqrt(2)^(2))

apply the arctangent formula and we get that the integral is 2arctan(x/sqrt(2)) taken from -sqrt(2) to 0 which is 2(arctan0 - arctan(-sqrt(2)/2)) = -2arctan(-sqrt(2)/2)

however https://www.integral-calculator.com/ calculated it by reverse substitution (dx = √2du) and the indefinite integral was sqrt(2)*arctan(x/sqrt(2)), while mine was 2arctan(x/sqrt(2)) . Where is the mistake?

Hi everyone!

I want to go to the Arctangent festival but so far none of my friends is interested.. so I was wondering if some people in here who were planning to go alone want to form a small group for the camping and hopefully if we have the same plans for some concerts too! Among the main bands I am really looking forward to see Polyphia and Zeal & Ardor.
Cheers!

LAST CALL!

I’m planning to do a print that we give to the band at the gig in Southampton this weekend. I didn’t want it to be from me though, I wanted it to be from US, as many of Coheed’s UK fans as possible.

So the idea is I pre print people's names, hometown and a few words (if they want to say anything – but keep it short for space) and then those of us able to meet before the gig will sign it. I didn’t want people who aren’t at the gig to miss out though, so what I’ve been doing is asking those who are interested but cant make the gig to email me their words with a high res scan of their signature.

I Can then print their signature on lightly, and trace over it in the same gold paint pen the rest of us will be signing with.

I’ve messaging everyone on my friends list that I’ve either met through coheed in person, or who has became facey mates through the band, I hope you’ll want to be included.

But it isnt just for people I know. People I'm yet to meet can jump on if they're quick, this is from Coheed's UK fanbase, not my little clique. You dont need to be attending the gigs even, if you want to be involved we are one among the fence regardless.

Unfortunately as I’ve been off on my holidays, the deadline to email me is tonight, as I need to print tomorrow. Sorry for the short notice, organisational skills are not something I’m blessed with, hah.

My email addy is russftm@gmail.com just write coheed in the subject line, and dont worry if you cant think of anything to say, a name, hometown and signature will look cool regardless.

https://m.imgur.com/a/Yx3PLZe

So for starters this is FCFS, so please comment before PM'ing me. The prices do NOT include shipping (Unless we are trading). Please reach out if you have any questions.

Timestamp

Arctangent Design02 built with lubed NK Creams and GMK stabilizers and a KBD67 PCB . The full EnjoyPBT Valentine Keyset is also included along with the extras as pictured in the last few photos. The board was not used much as I really don't like Linears all that much. I am looking to get $360 shipped

KUL87 w/ MX Blacks and a Tai Hao Keyset. I custom painted this as you can see in the photos. It is a color shift purple / green with a design painted on the back (The word bubble is just vinyl but the design is painted on). There are some paint blemishes but overall it is in great condition. For this keyboard I am looking to get $85 shipped

I am selling my SM keyboards TKL. It is transparent purple and teal with a copper plate. It has a Hineybush 87a PCB and is finished off with Kailh Box Blacks. It has GMK stabilizers, but keep in mind the spacebar stabilizer should probably be replaced. It works fine but it a bit sluggish and quite noisy currently. The tabs holding the bar in place broke so I had to replace them with a dab of hot glue as pictured. A new stabilizer would fix this issue. If you have any questions feel free to ask. $160 shipped OBO

The wrist rests were all made by me and are priced as follows:

TKL Teal / Purple Holographic: 14.00" Excellent condition, no blemish's on the top, some blemishes on the bottom, feet come pre mounted. Looking to get $50 shipped

60% Supreme Glitter Blurple: 11.75" Excellent condition, no blemish's on the top, with some defects and sanded edges on the bottom. Will come with feet that are not attached. Looking to get $45 shipped

60% Pink / Blue: 11.75" One of my first Attempts on a wrist rest. As pictured there are a fair number of surface bubbles / dull rings. The corners are also deformed as pictured. Looking for $17 shipped

Hello all!

Hope everyone is having a wonderful day. Some recent updates to my online store : https://arctangentkb.com/

Updates

• Updated case product pages to incorporate drop-down menu for ease-of-use and to show full price of acrylic/plate combinations
• Separated cases by color, can now see the cases that have already been made in certain colors, products with just sample pictures will update when cases in new colors have been made
• Added webpage for the Design03 - Stacked Acrylic Alice
  • Geekhack Thread
  • Google Form IC
• Reduced pricing of all 65% cases by $20 USD
  • Received price cut from acrylic laser cutting source
  • See potential in myself doing this long-term
• Ordered some KBD67 rev 2 PCBs to offer as kits along with the 65% case (Design02)
  • Will personally reflash each PCB with VIA and test before shipping

Other Links

Instagram: here

Alexotos build stream on Twitch: here

Board Information

• 65% Layout, arrow-key blocker
• Supports ISO, split backspace, split left shift, and stepped CAPs
• 6.5 degree typing angle
• Compatible PCBs include KBD67 rev 2, KBD67 v2 mkii (solder/hotswap), Savage65, Instant65
• Hardware includes 0.25" Dia. solid brass standoffs, low-profile top screws, standard-profile bottom screws, hex-keys, rubber feet

Customization

• 21 colors of matte/frosted acrylic
• 4 metal plate materials (Aluminum, Stainless Steel, Brass, Copper) each having 3 different finishes to them (vibration, brushed, sandblasted) and FR4 plates
• Offering plate foam from stupidfish designs

Pricing

Due to the amount of customizability I wish to offer, it is hard to give a general statement of price, so I can offer the range from the cheapest combination to the most expensive combination (with some details of course) and hopefully that can suffice to give a general idea.

• Clear frosted Acrylic + FR4 Plate + No plate foam = $175 + shipping
• Any color + Sandblasted Copper plate + plate foam = $275 + shipping

Every other combination falls in between that range. Full prices can be found on the website.

Thanks,

Arctan(KB)

f : R -> R, f(x) = xarctanx - ln(1+x^(2))

Solve the equation f'(x) = 0.

f'(x) = arctanx -x/(1+x^(2))

[-x + (1+x^(2))*arctanx]/(1+x^(2)) = 0

arctanx * (1+x^(2)) = x

arctanx = x/(1+x^(2))

x = tan[x/(1+x^(2))]

what now