**Nikiforov**

Vladimir O.

D.Sc., Prof.

Vladimir O.

D.Sc., Prof.

# DESIGN OF VARIABLES AND FORMULAS

All variables (in formulas, in the text, or in the picture) must have decryption (explanation) in the text (at the first mention), immediately after the formula in which they are __first introduced__, or in figure caption. The writing of variables in text, formulas and figures should be the same.

Font for Latin variables is Times New Roman __ italic__ (except sin, cos, tg, ctg, min, max, extr). Font for Greek letters is Symbol

__regular__. For Russian letters, numbers and brackets Times New Roman

__regular__is used. Marking of matrices and vectors is done with

__font, vector sign (arrow) is not assigned. The same writing is applied to the upper and lower indices. If the letter or group of letters is not variable, then Times New Roman regular font may be used.__

**bold**
The size of variables in formulas is used in accordance with the size of the main text in the following proportions (the example is given for the font # 12): if the formula is typed in **Eqn3.0**, the Size tab settings are: Size 12, 9, 8 , 18, 12; if the formula is typed in **MathType**, the Size tab settings are: Size 12 , 58 % , 42 %, 150 %. 100 %. Scale for variables and formulas when writing them in the MathType editor is 100%. (pt. 2.2 is convenient to check in print and electronic copies simultaneously).

A decimal marker is a full point (decimal point), “minus” sign - short dash, the multiplication sign - × (not x) , the sign of degrees - ° (not O) arrow sign - → (not -> ).

__The numbering__of formulas within the paper

__is continuous__. Formulas are numbered only

__in case they are referenced in the text__, but

__not before the formula__, always after the formula, for example ... (3). The numbered formulas should be referred to in the text. If there is no reference to the formula,

__it must not have numeration__.