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The following sections describe the main envisioned ways the content in this R package can be used and extended. The idea is that you start at level 1, and then depending on needs and interests, you can decide to move on to the next level.
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For learning the material and topic, going through all the tasks in the What to do section is the most important part. The idea is that by working through the tasks you will be able to learn the topic the app is meant to teach. If you are using the package as part of a course, you might be asked to write down and submit the answers you are asked to record for each task. Once you finished exploring a specific app, you can return to the main menu by clicking the Menu button in the upper left corner.
While level 2 provides the user with a fair amount of flexibility and the ability to investigate the models and ask questions that would be hard or impossible going through the graphical interface, there is still one major constraint. Namely this approach only allows use and analysis of pre-written, existing simulation models. This constraint can be overcome by directly modifiying and customizing the underlying simulation functions. As was true for moving from level 1 to 2, this move from level 2 to what I call level 3 provides further (almost unlimited) flexibility at the cost of having to write increasingly more R code.
The code for each simulator function is (hopefully) well documented. Some basic to intermediate level of R coding experience is likely required to successfully modify the functions. In addition to modifying the simulator function of interest, you will likely also have to write some additional code to interact with their modified function (as described in Level 2).
For most users and especially novice coders, it is likely best to start with one of the provided models and modify as needed. However, at this level, you have essentially full control and are only limited by what can be accomplished using the R programming language and your ability and interest in writing customized code.
Calculate the tree-level heterotic string amplitude with four gauginos. You can either do this directly, or by first calculating an appropriate bosonic open string amplitude and then using the open-closed relation.
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