Cauchy
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Joined 02-10-12, id: 3712368, Profile Updated: 03-07-15
Author has written 4 stories for Harry Potter, and Kuroshitsuji.

Status Check [23.02.15]

I don't know if I made a great or poor life choice in deciding to take a quantum mechanics course while having no classical mechanics background, but it's been taking up a significant portion of my time, so I probably won't be able to write for a long while. On the other hand QM is absolutely fascinating.


About Me Not certain what information about me would be useful here, but here are some generic profile details. I'm an undergraduate at a time-devouring university. I'm agender. I enjoy theorizing about fictional worlds way too much for it to be healthy. My native language is English, I guess, or Shanghai Chinese, I speak embarrassing Mandarin Chinese and passable German, and I am learning Russian and ASL - I like understanding what people say, and I should probably learn French but I keep putting it off for some reason.


Math Corner In pointless relevance to my pen name, here are some useful results produced by and/or named after Augustin-Louis Cauchy, along with some really crappy descriptions. By no means complete. Disclaimer: I am not a mathematician, I just hobby math. Also, I am happy to have finally signed up for complex analysis, and to finally have learned about a lot more things that were named after Cauchy.

The ones I actually know about:

Cauchy-Schwarz inequality - That really handy thing where the inner product of two variables is less than or equal to the product of their magnitudes.

Cauchy (sequence) - A sequence is cauchy if the elements get closer and closer together, and only a finite number of elements are more than a certain distance from one another.

Cauchy distribution - A distribution with fat tails, which has no mean or variance (I think it does have fractional moments less than 1 though). Its density function is something like 1/pi times the integral of arctangent. I do not currently know what it is useful for beyond that these are important things in physics.

Cauchy principal value - A fancy name for when you try to do an undefined integral by hedging around the undefined spot with limits and changing up the limits of integration with epsilons.

Cauchy-Riemann equations - Equations relating the partial derivatives of the real and imaginary parts of analytic complex functions. They are helpful.

Cauchy integral theorem (aka Cauchy-Goursat theorem) - Integral of an analytic function over a closed loop in a simply connected domain is 0. Leads to awesome cool simplification of integration.

Cauchy integral formula - A formula relating integration to differentiation . It is super amazing and provides great new ways of looking at old integration problems that used to be horrible.

Cauchy bounds - following from the integral formula, bounds on the value of the derivative of an entire function.

Things I don't know about but have heard of (now only is one thing):

Cauchy condensation test - A useful test for convergence that I never learned and which probably would have been good to know while I was dealing regularly with infinite series. Has something to do with checking the convergence of a "condensed" version of the series which is difficult to describe in words.

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thé à la grenouille by Moka-girl reviews
In which Harry goes to Beauxbâtons instead of Hogwarts. Butterflies ensue, with Voldemort reviving without opposition from Harry, Dumbledore trying to save the situation and Fudge making everything worse. Meanwhile, Harry learns French. (Twist on the cliché and a slow-going Independent!Harry)
Harry Potter - Rated: T - English - Adventure/Drama - Chapters: 25 - Words: 73,747 - Reviews: 330 - Favs: 281 - Follows: 408 - Updated: 4/19 - Published: 11/29/2013 - Harry P., Fleur D., Albus D., Olympe M.
Autophobia by Moka-girl reviews
The new student should have known better than to follow a suspicious guy carrying her unconscious pink-haired classmate. Well, to be honest, he had looked like one of those guys that preyed on young and innocent girls, so she couldn't just ignore the situation... Eventual William/OC
Code Lyoko - Rated: T - English - Romance/Horror - Chapters: 25 - Words: 38,388 - Reviews: 122 - Favs: 49 - Follows: 47 - Updated: 3/26 - Published: 4/10/2011 - Ulrich S., William D., Clone William, OC
My Dark Passengers by Malevolent Mind reviews
Twisted by witnessing his mother's murder at the age of eight, Harry begins a forbidden journey to bring her back from the dead. Trained and torn between light and dark mentors, he begins his path towards justice. Story includes: dark Harry, vengeful James Potter, awakened horcruxes, evil Voldemort and events of the first "Order of the Phoenix". Rated M: Violence, gore,*Rewrite up*
Harry Potter - Rated: M - English - Suspense/Horror - Chapters: 2 - Words: 4,285 - Reviews: 60 - Favs: 79 - Follows: 145 - Updated: 3/20 - Published: 7/10/2014 - Harry P., James P., Voldemort, Neville L.
Harry Potter and the Natural 20 by Sir Poley reviews
Milo, a genre-savvy D&D Wizard and Adventurer Extraordinaire is forced to attend Hogwarts, and soon finds himself plunged into a new adventure of magic, mad old Wizards, metagaming, misunderstandings, and munchkinry. Updates Fridays.
Crossover - Harry Potter & Dungeons and Dragons - Rated: T - English - Chapters: 72 - Words: 301,307 - Reviews: 5216 - Favs: 3,665 - Follows: 4,212 - Updated: 2/27 - Published: 5/7/2012
Sophie by Salomedancing reviews
Two women meet in a library, but one of them isn't quite who she seems. And Dracula does not take kindly to perceived competition. A sequel to "Clara". The Historian fandom but can be read by anyone who enjoys vampire stories.
Vampires - Rated: T - English - Horror/Angst - Chapters: 6 - Words: 9,011 - Reviews: 8 - Favs: 3 - Follows: 4 - Updated: 2/20 - Published: 4/22/2014 - Complete
You Will Be The Death of Me by TheSeaAtNight reviews
In which a plot is inspired by Despicable Me and Voldemort does not so much as mentor Harry but rather tries to get him to leave him alone.
Harry Potter - Rated: T - English - Angst/Family - Chapters: 5 - Words: 38,542 - Reviews: 46 - Favs: 105 - Follows: 153 - Updated: 1/11 - Published: 6/15/2013 - Harry P., Voldemort
The Ten Plagues by Lord Jeram reviews
Harry's search for the elusive Horcruxes takes a bloody turn, leading him into the crossfire of an invisible war - fought not between dark and light, but over the control of reality and magic itself. The players are unknown, and he must break free of a body of lies to find the truth.
Harry Potter - Rated: M - English - Adventure - Chapters: 11 - Words: 77,382 - Reviews: 85 - Favs: 152 - Follows: 172 - Updated: 1/6 - Published: 4/30/2007 - Harry P. - Complete
The Horcrux Within by althor42 reviews
AU When Harry is fighting Voldemort for the Philosopher's Stone, he makes the horrible discovery that he is keeping Voldemort alive by hosting a fraction of his soul. What is the rest of Harry's time at Hogwarts like when he knows that he has to die?
Harry Potter - Rated: T - English - Adventure/Angst - Chapters: 19 - Words: 160,466 - Reviews: 381 - Favs: 632 - Follows: 911 - Updated: 12/12/2014 - Published: 10/29/2011 - Harry P., Albus D.
Harry Potter and the Deus Ex Machina by Karmic Acumen reviews
It was a normal day, until newly turned 8 year-old Harry Potter decided to make a wish upon the dog star (even though he'd almost never actually seen it) and set off something in the Unlabeled Room in the Department of Mysteries. Turns out Dumbledore was wrong. Again. It wasn't love that the Unspeakables were studying down there.
Harry Potter - Rated: T - English - Adventure/Supernatural - Chapters: 22 - Words: 292,433 - Reviews: 730 - Favs: 1,772 - Follows: 1,153 - Updated: 12/22/2013 - Published: 1/10/2013 - Harry P., Sirius B., Regulus B., Marius B. - Complete
Der bessere Mann by Bonnie Gaynor reviews
Ein Ruf des Dunklen Lords, ein Verräter, eine Bestrafung - und ein Mann, den niemand vermissen wird... / Warnung: Folter! CharaDeath! (und ich mein's auch so!)
Harry Potter - Rated: M - German - Horror/Angst - Chapters: 1 - Words: 1,428 - Reviews: 3 - Favs: 2 - Follows: 1 - Published: 9/14/2013 - Severus S. - Complete
More than just a Tagalong by CrimsonDomi reviews
A One-Shot of how Peter Pettigrew came to betray his best friends.
Harry Potter - Rated: T - English - Tragedy/Angst - Chapters: 1 - Words: 1,360 - Reviews: 2 - Favs: 4 - Published: 7/23/2013 - Peter P., Voldemort - Complete
Der Zwillings-Trick by Fluffy Bond reviews
Eine Prophezeiung. Vier Kinder. Ein Verräter. Ein Vater überlebt, das falsche Kind wird gefeiert – alles ändert sich. Doch mit dem Schicksal zu spielen ist eine heikle Angelegenheit, und selbst die besten Pläne können scheitern, wenn sie Harry Potter betreffen. Falscher-Junge-der-überlebt, MagischesWesen!Harry
Harry Potter - Rated: T - German - Fantasy/Adventure - Chapters: 5 - Words: 13,075 - Reviews: 4 - Favs: 11 - Follows: 10 - Updated: 6/29/2013 - Published: 2/6/2013 - Harry P.
Gödel's Incompleteness by Linnya reviews
He had been alive for 934 years, he looked like a child, and he was scanning the corridors of Hogwarts with a sonic screwdriver. His chosen name was the Doctor, but as he was forced to walk the slow path amongst them, people had started calling him Barty Crouch Junior.
Crossover - Doctor Who & Harry Potter - Rated: T - English - Drama/Friendship - Chapters: 42 - Words: 40,404 - Reviews: 50 - Favs: 65 - Follows: 27 - Updated: 2/3/2013 - Published: 1/24/2013 - 10th Doctor, Barty C. Jr. - Complete
Rainy Day Savior by YazzyFic reviews
On his way to his Daughter and Son-in-Law's house, Mr. Granger picks up a young man with green eyes. One-shot. AU.
Harry Potter - Rated: K - English - Supernatural/Family - Chapters: 1 - Words: 4,143 - Reviews: 30 - Favs: 115 - Follows: 22 - Published: 1/14/2010 - Harry P., Dr. Granger - Complete
Code: Crisis by Vederick reviews
X.A.N.A returns and launches a deadly attack on the city. New alliances are formed - But as the violent entity's origins are revealed it becomes clear that getting rid of him won't be a easy as last time. Rated T for violence and some strong language
Code Lyoko - Rated: T - English - Sci-Fi/Suspense - Chapters: 15 - Words: 80,478 - Reviews: 25 - Favs: 34 - Follows: 5 - Updated: 9/8/2008 - Published: 6/28/2008 - Jeremie B., Xana - Complete
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Blood Crest reviews
The blood wards hid Harry Potter from those who wished to harm him. Unfortunately, foreign dark wizard Joachim Petri had no idea who Harry Potter even was. A wizard "rescues" a clueless Harry Potter from the Dursleys, but not all wizards are good people. Eventually Necromancer!Harry, Master of Death!Harry, no pairings.
Harry Potter - Rated: T - English - Adventure/Horror - Chapters: 8 - Words: 23,462 - Reviews: 68 - Favs: 179 - Follows: 308 - Updated: 1/7 - Published: 8/18/2014 - Harry P., Lucius M., OC
Lord Voldemort and the Intricate Plots reviews
Prophecy brings nothing but ruin, and half a prophecy is even worse. Lord Voldemort is neither fool nor weakling; he vows to break away from the prophecy's accursed magic. He is ready to defeat Albus Dumbledore at his own game. After all, Harry Potter is just a boy. AU, sort of Mentor!Voldemort.
Harry Potter - Rated: T - English - Fantasy - Chapters: 17 - Words: 110,202 - Reviews: 123 - Favs: 176 - Follows: 244 - Updated: 8/11/2014 - Published: 1/6/2013 - Harry P., Voldemort, Albus D.
Rise and Rise Again reviews
A mother's love can drive her to terrible lengths. Albus Dumbledore recognized what it was that protected little Harry Potter at first glance. But even the darkest magic can be used for good. Albus, of all people, knew that, and so he let it be.
Crossover - Harry Potter & Kuroshitsuji - Rated: K+ - English - Fantasy - Chapters: 2 - Words: 4,360 - Reviews: 26 - Favs: 113 - Follows: 147 - Updated: 8/29/2013 - Published: 7/25/2013 - Albus D., Sebastian M., William S.
The Twin Trick reviews
One prophecy. Four children. One traitor. A father survives, the wrong child is hailed - everything changes. But playing with fate is tricky business, and even the best-laid plans may fail when it comes to Harry Potter. Wrong-boy-who-lived, creature!Harry
Harry Potter - Rated: T - English - Fantasy/Adventure - Chapters: 5 - Words: 13,191 - Reviews: 11 - Favs: 46 - Follows: 71 - Updated: 5/20/2013 - Published: 2/5/2013 - Harry P.