| veranievelstein.nl | Vera Nievelstein Art | The artworks are organized by topics such as Geometry, Fibonacci, Magic Square, and the Theory of Everything, offering a visual exploration of these concepts. Visitors can click on individual images to view all works related to a specific topic, including behind-the-scenes information, exhibition details, publications, and the artist's inspiration. The website is currently under construction but presents an overview of Nievelstein's work and related themes, with links to her online presence on platforms like Etsy, Instagram, and LinkedIn. | Painting → Digital Art 820 | geometry 45 artworks 460 topic 1238 publication 2018 inspiration 4081 exhibition 5332 | |
| noncommutativegeometry.nl | Radboud University Nijmegen | The site provides news updates and announcements pertaining to Noncommutative Geometry research and events. It features a repository of documents, including presentations, papers, and conference proceedings, covering topics such as noncommutative manifolds, quantum gravity, and related areas. The website offers web lectures and a schedule of meetings, including conferences, seminars, and study groups focusing on diverse aspects of the field. | Events → Conferences & Meetings 5381 | study group 25 paper 770 meetings 1011 speaker 1481 | Gelderland → Nijmegen 9384 |
| rationalpoints.nl | Universities of Groningen, Leiden, and Utrecht | The project, commencing in September 2023 and concluding in September 2028, is supported by an NWO Open Competition ENW – XL grant. It is conducted by a consortium of researchers based at the Universities of Groningen, Leiden, and Utrecht, and comprises three interconnected themes. A key component of the project is an instructional workshop on rational points scheduled for Groningen in November 2024, intended for young researchers. | Mathematics → Algebra 20 | geometry 45 surface 130 workshop 19325 | South-Holland → Leiden 7089 |
| chrisvantienhoven.nl | Chris van Tienhoven | The site contains an encyclopedia focused on quadri-figures, exploring topics like centroids and points of least distance to lines within four-point configurations. It also features content related to triangle geometry, specifically investigating collinearities and introducing the concept of perspective fields. The website offers downloadable resources and links to other relevant materials, with some pages available in both English and Dutch. | Curriculum & Resources → Educational Resources 401 | downloads 152 | |
| dodecaeder.nl | Dodecaeder.nl | Over the years, various theories have been formulated about the meaning and use of dodecahedrons, ranging from candlesticks to geodetic instruments. The website also covers various other mysteries, including the Celtic horse goddess Epona, the origin of Halloween/All Saints' Day, and the meaning of the Egyptian Sphinx. A recent hypothesis about the Roman pentagonal-dodecahedral has led to follow-up research that explores the relationship between archeology and astronomy. | Travel & Exploration → Ancient Civilizations 17 | roman 10 mystery 70 theory 956 | |
| vandeveen.nl | Paul Gerard van de Veen | The author has written a book about chain breaks, with the first 18 pages containing illustrations of chain breaks. An instruction is provided for building a Meccano-framed robot that can solve the ‘Bicolored Towers of Hanoi’ puzzle. The website describes various projects, such as a motor powered by solar energy, a Meccano Rubik’s Cube Solver, and geometric constructions like a diprismatohexacosihecatonicosachoron and a Rombicosidodecahedric diprismatohexacosihecatonicosachoron. | Technology → Robotics & Automation 860 | arduino 123 solar energy 373 robot 423 | Enschede → City Measures 16 |
| gqt.nl | Universiteit Utrecht | GQT originated as a project funded by the Dutch Research Council (NWO) and several universities, and now involves researchers from multiple Dutch institutions. The cluster’s research areas encompass a wide range of geometric fields, including topology, differential geometry, and connections to quantum theory and string theory. GQT organizes workshops, conferences, and schools to support research, educate PhD students, and foster collaboration within the mathematical community. | Thesis & Research → University Research 20 | geometry 45 mathematics 393 conference 763 school 7856 research 8967 | |
| raymondvanbommel.nl | University of Bristol | The website details Raymond van Bommel's research publications, including those accepted for publication and preprints. It lists publications co-authored with various mathematicians, spanning topics like plane quartics, abelian varieties, and isogeny classes. The site also provides contact information for Raymond van Bommel, including his office location and email address, alongside links to his publications on ArXiv. | Mathematics → Algebra 20 | publication 2018 | |
| dutchplottr.nl | Dutchplottr | The website features a diverse range of mathematical artworks, including shells, hexagons, rays, and various geometric shapes such as squares, triangles, and hexagonal cubes. Dutchplottr explores concepts such as binary patterns, linear trajectories, and powerful functions through the representation in its artworks. The site also contains information about exhibitions, publications, and lectures, and a potential way to purchase or obtain the artwork. | Painting → Digital Art 820 | shell 130 line 236 exhibition 5332 | |
| driehoekberekenen.nl | Niet vermeld | Users can calculate the sides, angles, height, area, and perimeter of a triangle using the online calculator. The website provides a graphical representation of the triangle after inputting at least one side. The website also describes the sine rule and cosine rule, which are used when calculating angles and sides of triangles, and gives examples of their applications. | Tools → Calculators 68 | triangle 13 angle 23 side 74 calculator 475 | |
| raves.nl | Raves.nl | The website contains links to a PDF with the theory behind the regular pentagon and heptagon, including a construction of the pentagon with a proof. Videos are available demonstrating the construction of the pentagon and the Fagnano Theorem, with animations in the PDF document and on a follow-up page. The website offers a Cartesian proof of the Pythagorean Theorem, specifically aimed at MAVO students, with explanations of similar triangles, ratio tables, and cross-multiplication. | | proof 41 pdf 142 mathematics 393 video 6714 construction 7421 | |
| oppervlaktemaat.nl | oppervlaktemaat.nl | The website contains a calculator that allows users to convert area units into different units. It explains the different area units, such as square meters, hectares, acres, and square kilometers, and their relationship to one another. The website also covers the conversion of length measurements and area calculation. | Business Software → Online Tools 396 | length 65 meter 76 calculator 475 | |
| hanlammers.nl | Han Lammers | Han Lammers is a visual artist who transforms mathematical equations into three-dimensional sculptures, often in zinc. His work is characterized by concrete and pure forms and is compared to minimalism and constructivism. Lammers' sculptures encompass both massive, static forms and more open, dynamic and lyrical forms. The focus is on geometric forms, eliminating chance and surprise. The website presents a collection of his works, including various titles referencing mathematical concepts such as Pythagoras, octahedron, and polyhedra, as well as exhibitions and projects. | | geometry 45 zinc 367 mathematics 393 sculpture 1440 | |
| inchnaarcm.nl | InchnaarCm.nl | The website contains various conversion tools for converting different units, including inches to centimeters, feet, kilometers, meters and millimeters. There is a specific conversion tool for converting inches to feet, as well as for converting inches to centimeters, kilometers and meters. The website also discusses the context of inch conversions in relation to hockey sticks and television screens, and tablet dimensions. | Social Issues & Welfare → Disability Services 949 | television 709 tablet 998 foot 1929 | |
| oloide.nl | oloide.nl | The website contains articles about the oloide, including information from films that describe the origin of the oloide, from Rudolf Steiner's initial assignment to the production of wooden oloides. A key focus of the website is the 'Oloide Film', a 16-minute film that explains the story of the oloide. Oloide.nl regularly organizes events, such as markets, where visitors can discover, experience, and purchase oloides. | Woodworking → Wood Carving 139 | film 3007 wood 4153 | |
| henkhietbrink.nl | Ars et Mathesis | Henk Hietbrink's website presents a collection of his designs and research related to muqarnas, a complex Islamic geometric pattern. The site features multiple webpages exploring interpretations of muqarnas designs contributed by various artists and scholars, along with 3D printed models and educational materials. Hietbrink also shares his work through social media, including Instagram posts documenting muqarnas plans, and has presented his research at conferences and workshops, including a workshop on muqarnas for the NVvW. | Painting → Digital Art 820 | instagram 1216 software 8291 workshop 19325 design 27202 | Noordwijk → Noordwijkerhout 1099 |
| berekening-maandlasten.nl | cirkelberekenen.be | The website offers an online calculator to calculate the circumference, area, diameter, or radius of a circle. Calculation formulas for the circle are also presented. The website covers the definition of a circle, including concepts such as center and radius, and the relationship between circumference, area, and radius. | | diameter 36 circle 235 formula 287 | |
| handigmetgetallen.nl | Cantal | The website offers information about textbooks that assist Pabo students in acquiring the required mathematical knowledge. Handig met Getallen adheres to the Kennisbasis wiskunde requirements of the Pabo and prepares students for the LKT Wiskunde. Several textbooks, including 'Handig met getallen 4 – Meetkunde' and 'Handig met getallen 5 – Verbanden,' are freely available on the website. | | pabo 39 geometry 45 textbook 73 relationship 4205 | |
| houtmotief.nl | Frithjof | The website offers a portfolio of products, including gifts in various price ranges and various woodworking objects such as mirror holders, espresso filter holders and furniture. The website's menu is organized around searching for information with lots of photos, and focuses on activities such as making Oloides, offering courses and workshops, and showcasing new work. One of the offered workshops is the 'Oloide Workshop', a practical one-day course of six hours in which participants can make their own small Oloide, including materials, coffee, tea and a biological lunch. | Woodworking → Wood Carving 139 Ceramics → Pottery 292 | wood 4153 furniture 8751 course 14728 workshop 19325 | North-Holland → Haarlem 8674 |
| digitaleslingers.nl | DigitaleSlingers | The website sells themed e-books with activities, decorations, and planning materials for children's parties, ranging from pirates to princesses. Furthermore, the website offers free downloads, such as invitations, to-do lists, and budget planners, to simplify the organization of children's parties. The website also contains activities and games for various holidays, such as Easter, Sinterklaas (St. Nicholas), Halloween, and Christmas, and travel games for on the go. | | downloads 152 e-book 1060 game 2807 theme 4015 party 5928 | |
| jeroenopdebeek.nl | Jeroen Op de Beek | The blog details the use of a C++ library called Geo Debugger for visualizing computational geometry problems. A recent post describes a solution to the ‘Ink Blots’ problem from a 2004 ICPC contest. The blog is hosted and maintained using the WordPress platform. | Programming Languages → C 23 | geometry 45 library 988 problem 2214 wordpress 3551 blog 13392 | |
| teqdesign.nl | The model ‘Icosaëder’ bv. | The objects originated from hand-calculated glass and plastic models in 1988 and are now virtually designed and then manually constructed. The shapes of the objects, such as the Icosahedron and the Dodecahedron, are based on natural structures, such as the carbon atom and the mineral Pyrite. The light objects are used in both small living rooms and larger public spaces and can be equipped with moving LED lamps for a dynamic light show. | Sculpture → Art Objects 48 | light source 39 stainless steel 737 | |
| wiskundemetmeneerbuter.nl | Wiskunde met meneer Buter | The website covers various topics within geometry, including two-dimensional (2D) and three-dimensional (3D) figures, with concrete examples and exercises. It offers help with applying formulas, creating graphs, calculating slope coefficients, and solving equations. Practice tests and answers are also provided for different grades and chapters, specifically for grade 4. | | practice tests 21 geometry 45 graph 104 vmbo 198 formula 287 statistics 392 | |
| inchomrekenen.nl | Inchomrekenen.nl | The website contains a calculator tool that allows users to easily convert inches to various length measurements. An explanation is provided about the inch (English inch), its origin and usage, especially in the context of product sizes such as monitors and tires. Examples show how inches can be converted to centimeters (e.g., 1 inch = 2.54 cm) and how this can be applied to concrete product sizes. | Tools → Calculators 68 | calculator 475 calculation 657 monitor 1063 tire 1975 | |
| mevrouwdijkhof.nl | mevrouwdijkhof.nl | The site contains digital tools aligned with the textbook ‘Getal & Ruimte’ 10th edition. It offers a selection of videos, both self-made and found on YouTube, to illustrate the learning material. Users can select a relevant chapter based on their class level via a link at the top of the page. | Educational Innovation → Digital Tools 63 | digital tools 41 geometry 45 textbook 73 chapter 76 statistics 392 video 6714 | |
| latinsquares.nl | Y.M. de Haan | The document investigates the geometry, symmetry, and multiplicity of Latin squares, demonstrating that sets of Latin squares can be categorized into a limited number of structural types. It details a reduction process applied to Latin squares of order 4 and 5, successively reducing them to a small number of unequal Latin squares, specifically 5 and 18, respectively. The study utilizes approaches like extending Latin squares to cyclic structures, determining symmetry relations, and analyzing the increasing slowness of geometric pattern variations with order, exemplified by the numbers 2, 4, 10, and 28 for orders 4 through 7. | Mathematics → Algebra 20 | symmetry 16 geometry 45 structure 1305 order 6912 | |