Abstract: A combined cryptosystem with symmetric keys for encrypting messages is proposed. Its unique feature is the use of functions of a real variable as keys instead of natural numbers. Eight key ...

1 Institute of Mathematics, University of Lübeck, Lübeck, Germany 2 Institute of Mathematics, National Academy of Sciences of Ukraine, Kyiv, Ukraine This paper ...

You can use the Sum function in Microsoft Office Excel to sum columns of data, whether your data is in an Excel table or is simply a range in a column of your ...

Google Sheets can be used to keep your work organized. With a few formulas, you can work with sheets very easily that will help you make your working time shorter, and help you save a lot of time.

To sum and subtract in Google Sheets, use the formula =SUM(x:y) or =MINUS(x,y) in the desired cells and input the relevant values. Press Enter to get the results. Adding up columns or rows of numbers ...

If you want to know how to sum cells with text and numbers in Excel, we’ve got you covered. Dealing with numbers in Excel is usually a breeze, but things can get tricky when these numbers are tucked ...

Manage all AI prompts from one structured library with WinBuzzer Prompt Station. Use prompt-chains, prompts, text insertions with ChatGPT, Gemini, Claude, Grok, AI Studio, Mistral. With versioning, ...

If you want to know how to sum all matches with VLOOKUP in Excel, you’ve landed on the right page. In this guide, we’ll explore three straightforward methods. First, we’ll dive into the approach of ...

Having issues with the Excel SUM formula not adding properly? Worry not, we got the solution. Remember that you need to respect the formula syntax, so be sure you add it with the right commands.