Set Theory Basics: Interactive Union, Sorting, and Text Input

This GeoGebra example provides an interactive demonstration of fundamental set theory operations. ① It shows how to use text fields, buttons, and sorting functions to dynamically manipulate set elements and display results such as the union of two sets. ② Core mathematical concepts include set union, element sorting, set representation, and basic logical organization of data. ③ Construction highlights: from the summary, commands like Sample, Sort, and Textfield are used, with objects including A, B, union, multiple text labels (text1 to text9), an input box (inputBox1), buttons (button1, button2), and variables n and d, enabling interactive set operations. ④ Suitable for middle school students learning introductory set theory, as well as university discrete mathematics courses, this example helps learners visualize abstract set operations and practice building interactive models with dynamic mathematics software.