Portal:Mathematics/Selected picture
![]() | This page is part of the Mathematics Portal |
This is the collection of pictures that are being randomly selected for display on Portal:Mathematics. (This system replaces the previous "Featured picture" system that was in use until March 2014.)
To add a new image:
- Edit any existing subpage in the list below (link in upper-left corner of box) and copy its wikicode.
- Select the first non-existing subpage listed below (shown as a "redlink") to start editing that subpage, and paste the wikicode you just copied.
- If there is no "redlink" at the bottom of the list, edit this page and look for the code
{{numbered subpages|max=nn}}
. Increase nn by 2 (so there will still be a redlink after you create one new supage) and save the page.
- If there is no "redlink" at the bottom of the list, edit this page and look for the code
- Change all the relevant template parameters, as necessary.
- Note that the value of the
caption
parameter is used as the image's "alt text" and so should describe the appearance of the image as if explaining it to someone who cannot see it. You need not use a complete, grammatically correct sentence for this (e.g., "animation of blah" can be used instead of "This is an animation of blah."). - The
text
parameter is displayed as a paragraph of text below the image and should use complete, grammatically correct sentences to explain the meaning of the image and its significance from a mathematical perspective. - If the code you copied in step 1 used the
size
parameter to specify the image size, try removing that line to see whether the image looks acceptable at the default size. - Finally, note that we do not use the
gallery
,location
orarchive
parameters of the {{Selected picture}} template. Also, please do not change thepage = picture
orframecolor = transparent
lines.)
- Note that the value of the
- Save the new subpage and check that it's being displayed correctly in the list below. (You may have to purge the cache to see the changes.)
- If the default size is not acceptable (for example, if a raster image is being displayed larger than its actual size or if a GIF animation is showing up as a static image), the
size
parameter can be used to set the width (in pixels) of the image.
- If the default size is not acceptable (for example, if a raster image is being displayed larger than its actual size or if a GIF animation is showing up as a static image), the
- Edit Portal:Mathematics and locate the template call that randomly chooses the pictures for display:
{{Random portal component|max=nn|subpage=Selected picture|header=Selected picture}}
- Increase the number nn to reflect the new count of selected pictures, and save the page.
- And you're done.
To find good images to add here, see any of the following image collections:
- Portal:Mathematics/Featured picture archive (there are still a few good images that haven't been ported from the old system)
- Wikipedia:WikiProject Mathematics#Featured images
- Wikipedia:Featured pictures/Sciences/Mathematics
- Wikipedia:Featured pictures/Diagrams, drawings, and maps/Diagrams
- Commons:Category:Featured diagrams
- Commons:Category:Mathematics
You can also simply look through the images currently being displayed in our mathematics articles:
- Wikipedia:WikiProject Mathematics/Recognized content
- Wikipedia:Featured articles#Mathematics (consider also other sections on related fields, like economics, engineering, physics, astronomy, etc.)
- Wikipedia:Good articles/Mathematics
- Lists of mathematics topics
- Category:Mathematics
Try to select new images from areas of mathematics that are not already represented in the list below.
Selected picture 1
Portal:Mathematics/Selected picture/1
Selected picture 2
Portal:Mathematics/Selected picture/2
![hand-drawn three-dimensional graph](http://up.wiki.x.io/wikipedia/commons/thumb/7/74/Jahnke_gamma_function.png/500px-Jahnke_gamma_function.png)
Selected picture 3
Portal:Mathematics/Selected picture/3
![animation of the classic "butterfly-shaped" Lorenz attractor seen from three different perspectives](http://up.wiki.x.io/wikipedia/commons/1/13/A_Trajectory_Through_Phase_Space_in_a_Lorenz_Attractor.gif)
Selected picture 4
Portal:Mathematics/Selected picture/4
![truncated icosahedron with black pentagonal faces and white hexagonal faces, beside a similar-looking 1970s soccer ball](http://up.wiki.x.io/wikipedia/commons/thumb/7/7d/Trunc-icosa.jpg/500px-Trunc-icosa.jpg)
Selected picture 5
Portal:Mathematics/Selected picture/5
![animation of one possible knight's tour on a chess board](http://up.wiki.x.io/wikipedia/commons/d/da/Knight%27s_tour_anim_2.gif)
Selected picture 6
Portal:Mathematics/Selected picture/6
Selected picture 7
Portal:Mathematics/Selected picture/7
![animation illustrating the meaning of a line integral of a two-dimensional scalar field](http://up.wiki.x.io/wikipedia/commons/4/42/Line_integral_of_scalar_field.gif)
Selected picture 8
Portal:Mathematics/Selected picture/8
Selected picture 9
Portal:Mathematics/Selected picture/9
![animation of the construction of a fourth-degree Bézier curve](http://up.wiki.x.io/wikipedia/commons/a/a4/B%C3%A9zier_4_big.gif)
Selected picture 10
Portal:Mathematics/Selected picture/10
![diagram of a unit circle and several associated triangles whose side lengths are the values of the various trigonometric functions](http://up.wiki.x.io/wikipedia/commons/thumb/9/9d/Circle-trig6.svg/500px-Circle-trig6.svg.png)
Selected picture 11
Portal:Mathematics/Selected picture/11
![graph of an increasing curve showing cumulative share of income earned versus cumulative share of people from lowest to highest income](http://up.wiki.x.io/wikipedia/commons/thumb/5/59/Economics_Gini_coefficient2.svg/500px-Economics_Gini_coefficient2.svg.png)
Selected picture 12
Portal:Mathematics/Selected picture/12
![animation showing a roughly star-shaped graph being traced out as a smaller circle rolls around inside of a larger circle](http://up.wiki.x.io/wikipedia/commons/f/fa/HypotrochoidOutThreeFifths.gif)
Selected picture 13
Portal:Mathematics/Selected picture/13
Selected picture 14
Portal:Mathematics/Selected picture/14
![three double-cones cut by planes in different ways, resulting in the four conic sections](http://up.wiki.x.io/wikipedia/commons/thumb/d/d3/Conic_sections_with_plane.svg/500px-Conic_sections_with_plane.svg.png)
Selected picture 15
Portal:Mathematics/Selected picture/15
![low-resolution ASCII-art depiction of the Mandelbrot set](http://up.wiki.x.io/wikipedia/commons/thumb/d/d7/Mandel.png/300px-Mandel.png)
Selected picture 16
Portal:Mathematics/Selected picture/16
Selected picture 17
Portal:Mathematics/Selected picture/17
![illustration of a closed loop (a circle) and progressively more knotted loops](http://up.wiki.x.io/wikipedia/commons/thumb/1/12/Knot_table.svg/300px-Knot_table.svg.png)
Selected picture 18
Portal:Mathematics/Selected picture/18
![three-dimensional rendering of a pink, translucent Klein bottle](http://up.wiki.x.io/wikipedia/commons/thumb/2/2d/Klein_bottle_translucent.png/500px-Klein_bottle_translucent.png)
Selected picture 19
Portal:Mathematics/Selected picture/19
![network diagram showing inputs A and B with carry-input C_in, five intervening logic gates, and the resulting sum S and carry-output C_out](http://up.wiki.x.io/wikipedia/commons/thumb/a/a9/Full-adder.svg/500px-Full-adder.svg.png)
Selected picture 20
Portal:Mathematics/Selected picture/20
Selected picture 21
Portal:Mathematics/Selected picture/21
![animation of a grid of boxes numbered 2 through 120, where the prime numbers are progressively circled and listed to the side while the composite numbers are struck out](http://up.wiki.x.io/wikipedia/commons/thumb/8/8c/New_Animation_Sieve_of_Eratosthenes.gif/400px-New_Animation_Sieve_of_Eratosthenes.gif)
Selected picture 22
Portal:Mathematics/Selected picture/22
![graph showing two sets of 4 points, each set perfectly fit by a trend line with positive slope; the set of points on the left is higher and the set on the right lower, so the entire collection of points is best fit by a trend line with negative slope](http://up.wiki.x.io/wikipedia/commons/thumb/4/47/Simpson%27s_paradox_continuous.svg/500px-Simpson%27s_paradox_continuous.svg.png)
Selected picture 23
Portal:Mathematics/Selected picture/23
![three hand-drawn diagrams of boxes containing grids of pins that a small ball may fall through, ending up in one of several bins at the bottom](http://up.wiki.x.io/wikipedia/commons/thumb/7/7f/Quincunx_%28Galton_Box%29_-_Galton_1889_diagram.png/350px-Quincunx_%28Galton_Box%29_-_Galton_1889_diagram.png)
Selected picture 24
Portal:Mathematics/Selected picture/24
![four scatterplots each containing 11 points and a fitted regressions line; the scatterplots look very different but each has the same regression line](http://up.wiki.x.io/wikipedia/commons/thumb/e/ec/Anscombe%27s_quartet_3.svg/450px-Anscombe%27s_quartet_3.svg.png)
Selected picture 25
Portal:Mathematics/Selected picture/25
![proof without words that the sum of the cubes of the first n natural numbers is the square of the sum of the first n natural numbers](http://up.wiki.x.io/wikipedia/commons/thumb/2/26/Nicomachus_theorem_3D.svg/500px-Nicomachus_theorem_3D.svg.png)
Selected picture 26
Portal:Mathematics/Selected picture/26
![a smooth surface, vaguely conical in shape and embedded in a basket-like mesh of points, rotates in empty space](http://up.wiki.x.io/wikipedia/commons/e/ea/NURBS_3-D_surface.gif)
Selected picture 27
Portal:Mathematics/Selected picture/27
![animation showing a torus (a doughnut shape) being cut diagonally by a plane, causing the appearance of two interlocking circles on the cut surface](http://up.wiki.x.io/wikipedia/commons/f/f1/Villarceau_circles.gif)
Selected picture 28
Portal:Mathematics/Selected picture/28
![three lines connecting corresponding vertices of a larger triangle on the left and a smaller one on the right converge at a point further to the right called the "center of perspectivity"](http://up.wiki.x.io/wikipedia/commons/thumb/c/c8/Desargues_theorem_alt.svg/500px-Desargues_theorem_alt.svg.png)
Selected picture 29
Portal:Mathematics/Selected picture/29
![animation showing a right triangle being duplicated and rearranged in a way that illustrates the Pythagorean theorem](http://up.wiki.x.io/wikipedia/commons/thumb/7/70/Pythagoras-2a.gif/500px-Pythagoras-2a.gif)
Selected picture 30
Portal:Mathematics/Selected picture/30
![animation showing what looks like a smaller inner cube with corners connected to those of a larger outer cube; the smaller cube passes through one face of the larger cube and becomes larger as the larger cube becomes smaller; eventually the smaller and larger cubes have switched positions and the animation repeats](http://up.wiki.x.io/wikipedia/commons/5/55/8-cell-simple.gif)