Y for YinYang

Y in maths stands for the phenomenon that is to be explained. If you are lucky, it is just one single Y. To explain this phenomenon, we usually have a multitude of different X-es and some random chance element. To complicate things a bit, we have X running over time. Example: Happiness at retirement age (66) might be explained by your earnings over years and marital unions/separations over time plus health over time and other random, not specified elements.
In my understanding of the YinYang philosophy of balancing the complementary of Yin and Yang, I probably should have thrived for a balance of earnings and health throughout my working life, to arrive at a happy retirement. Balancing not only among the X-es, but also between X and Y might even out the excitement about retirement. Additionally, this reasoning leads us to the more complicated case of multiple Y-s and multiple X-es. We can image the optimisation issue of y for 2 persons rather than just 1. Now, the maths starts to get more complicated without being complex in the mathematical sense. If you can solve such equations in statistics using different forms of random and not- so-random error terms, yr doomed for a Nobel medal in economics. What the heck, man this has to do with Yin and Yang? Beware of your work-life balance, be selective, I suppose. Breathe carefully, repair (YoYi) and read up on Chinese philosophy and maybe TCM, short for Traditional Chinese Medicine. Let’s try to re-balance in a lot of life-domains. We know our Western way of life (CO₂) is not sustainable. Imagine 1 billion Europeans driving a diesel car on this planet and you have an idea about what hell might be like. An open mind to the Yin and Yang philosophy could be helpful for us, just as much as it would be for the leading Chinese politicians and their policies. Yes, Y in French is much more common than in other languages “Y avait …” is the beginning of chansons (ex 1 Aufray, ex 2 Kaas, portrait). Drawing YinYang using formulas is a bit like drawing or painting mandalas. It helps your inner balance. I am not quite there yet.