User:Hogon4915121/be bold

Being bold is important on Wikipedia. Wikipedia is a free, digital encyclopedia accessible to everyone with access to the Internet. It has valuable information on density functional theory. (DFT) The local density approximation (LDA) to the theory was introduced in 1965 by Kohn and Sham. The theory is based on two theorems.


 * The first theorem states that the external potential acting on an electron system meeting certain conditions is a unique functional of the electron density.
 * The second theorem states that the energy content of the Hamiltonian, obtained by a calculation, reaches its minimum value when the charge density employed in the calculation is that of ground state of the material or system under study..

This theory is presently the one for the theoretical description of electronic, optical, structural, magnetic, and related properties of materials, from atoms, molecules, and clusters to nanostructures, semiconductors, insulators, and metals. Boldness

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