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2. Dilation (metric space) - Wikipedia

   en.wikipedia.org/wiki/Dilation_(metric_space)

   In Euclidean space, such a dilation is a similarity of the space. [2] Dilations change the size but not the shape of an object or figure. Every dilation of a Euclidean space that is not a congruence has a unique fixed point [3] that is called the center of dilation. [4] Some congruences have fixed points and others do not. [5]

3. Dilation (morphology) - Wikipedia

   en.wikipedia.org/wiki/Dilation_(morphology)

   Dilation (usually represented by ⊕) is one of the basic operations in mathematical morphology. Originally developed for binary images, it has been expanded first to grayscale images, and then to complete lattices. The dilation operation usually uses a structuring element for probing and expanding the shapes contained in the input image.

4. Mathematical morphology - Wikipedia

   en.wikipedia.org/wiki/Mathematical_morphology

   Mathematical Morphology was developed in 1964 by the collaborative work of Georges Matheron and Jean Serra, at the École des Mines de Paris, France.Matheron supervised the PhD thesis of Serra, devoted to the quantification of mineral characteristics from thin cross sections, and this work resulted in a novel practical approach, as well as theoretical advancements in integral geometry and ...

5. Spacetime diagram - Wikipedia

   en.wikipedia.org/wiki/Spacetime_diagram

   A spacetime diagram is a graphical illustration of locations in space at various times, especially in the special theory of relativity.Spacetime diagrams can show the geometry underlying phenomena like time dilation and length contraction without mathematical equations.

6. Homothety - Wikipedia

   en.wikipedia.org/wiki/Homothety

   Together with the translations, all homotheties of an affine (or Euclidean) space form a group, the group of dilations or homothety-translations. These are precisely the affine transformations with the property that the image of every line g is a line parallel to g .

7. Erosion (morphology) - Wikipedia

   en.wikipedia.org/wiki/Erosion_(morphology)

   This simple "probe" is called structuring element, and is itself a binary image (i.e., a subset of the space or grid). Let E be a Euclidean space or an integer grid, and A a binary image in E . The erosion of the binary image A by the structuring element B is defined by:

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   mail.aol.com

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9. Time dilation - Wikipedia

   en.wikipedia.org/wiki/Time_dilation

   Time dilation is the difference in elapsed time as measured by two clocks, either because of a relative velocity between them (special relativity), or a difference in gravitational potential between their locations (general relativity). When unspecified, "time dilation" usually refers to the effect due to velocity.