DESIGN OF VARIABLES AND FORMULAS
Font for variables and numbers is Times New Roman, font for Greek letters is Symbol. Marking of matrices and vectors is done with direct, bold font, vector sign (arrow) is not assigned. Italic font is used for Latin letters (except sin, cos, tg, ctg, min, max, extr). Roman font is used for Greek letters, Russian letters, numbers and brackets. The same writing is applied to the upper and lower indices.
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, "minus" sign - short dash, the multiplication sign - × (not x) , the sign of degrees - ° (not O) arrow sign - → (not -> ).
Formulas are numbered only in case they are referenced in the text, for example ... (3). The numbered formulas should be referred to in the text. The numbering of formulas within the paper limits is continuous.
All variables in the text should have decryption.