Haunted dolls are dolls that are believed to be possessed by spirits or supernatural entities. The concept often captures public interest and horror, with stories and legends that suggest these dolls might exhibit strange behavior, cause disturbances in their environment, or even influence the lives of those who own them. Common themes in haunted doll narratives include: 1. **Origins**: Many haunted dolls have backstories that involve tragic events, such as the death of a child or a strong emotional attachment from a previous owner.
Kewpie is a popular brand originating from Japan, best known for its mayonnaise, salad dressings, and sauces. The Kewpie mayonnaise, in particular, is distinguished by its creamy texture and unique flavor, which is enhanced by the use of egg yolks and apple cider vinegar. This mayonnaise has gained a following both in Japan and internationally.
Fact-checking is the process of verifying the accuracy and truthfulness of information, claims, statements, or assertions made by individuals, organizations, and media. It involves researching and cross-referencing facts against reliable sources to determine whether the information presented is correct, misleading, or false. Fact-checking can be applied in various contexts, including journalism, politics, social media, and academic work, to help reduce the spread of misinformation and disinformation.
visualizing the Riemann hypothesis and analytic continuation by 3Blue1Brown (2016) is a good quick visual non-mathematical introduction is to it.
The key question is: how can this continuation be unique since we are defining the function outside of its original domain?
The answer is: due to the identity theorem.
Visualizing the Riemann hypothesis and analytic continuation by 3Blue1Brown (2016) by 
Ciro Santilli 40 Updated 2025-07-16
Ciro Santilli 40 Updated 2025-07-16Good ultra quick visual non-mathematical introduction to the Riemann hypothesis and analytic continuation.
The finite element method is one of the most common ways to solve PDEs in practice.
Used to solve partial differential equation.
eigenvalue problem of Laplace's equation.
Pinned article: Introduction to the OurBigBook Project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 3. Visual Studio Code extension installation.
Figure 4. Visual Studio Code extension tree navigation.
Figure 5. Web editor. You can also edit articles on the Web editor without installing anything locally.Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.Video 4. OurBigBook Visual Studio Code extension editing and navigation demo. Source. 
- Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact