Trees that grow from seeds start out as tiny seedlings, usually growing directly under the parent tree--the tree that dropped its seeds. Often, those seedlings die because they are blocked from receiving sunlight and moisture. However, seedlings raised in nurseries usually do very well, depending on the species of tree.
Italian Renaissance painters and architects including Filippo Brunelleschi, Masaccio, Paolo Uccello, Piero della Francesca and Luca Pacioli studied linear perspective, wrote treatises on it, and incorporated it into their artworks, thus contributing to the mathematics of art.
Seurat and Pointillism. The earliest herald of the new trend that broke with Impressionism was Georges Seurat. He developed the style of painting known as Pointillism, which refers to the use of a point, or dot, as the basis for the construction of a painting.