The derivative of a function is a local concept, is calculated as the limit of the speed of average change of the function at a certain interval, when the interval considered for the independent variable becomes increasingly smaller. Thus we speak of the value of the derivative of a certain function at a given point . When studying reading if a function representing the text of a reticle with respect to the image, its derivative is decoding.


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  • Fanzine selected in the "MUFART" 100 free copies in black and white and second edition of 100 copies to color. digital printing, bond paper, 16 pages.