Meaning Of A 401k Being Fully Vested

The subject of meaning of a 401k being fully vested encompasses a wide range of important elements. notation - What does := mean? - Mathematics Stack Exchange. Other symbols I have seen used for "is defined to be equal to" are three horizontal lines instead of two, and $=$ with either a triangle or "def" written directly above it.

I have seen variants of these used by people who predate widespread knowledge of computer programming. In this context, it would be interesting to know the earliest uses of a special symbol for this (and what symbols were chosen). You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Upvoting indicates when questions and answers are useful. What's reputation and how do I get it?

Instead, you can save this post to reference later. I have started seeing the "∈" symbol in math. What exactly does it mean?

I have tried googling it but google takes the symbol out of the search. What is the meaning of ⊊? I have encountered this when referencing subsets and vector subspaces. For example, T ⊊ span(S) should mean that T is smaller than span(S)--at least from what I've gathered.

In this context, is ⊊ a sort of ≤ or &lt... Much less than, what does that mean? I am familiar that this symbol means much less than. ...but what exactly does "much less than" mean? (Or the corollary, $\\gg$) On Wikipedia, the example they use i...

Similarly, the meaning of various equality symbols - Mathematics Stack Exchange. Additionally, what is the meaning of the double turnstile symbol ($\models$)?. In summary: The interplay of meaning and axiomatic machine mathematics, captured by the difference between $\models$ and $\vdash$, is a subtle and interesting thing. inequality - What does <> mean?

Additionally, what do the less-than and greater-than symbols right next to each other mean? Does it mean either less than or greater than? In other words, not equal?

I am trying to understand a book that says th... Equally important, three dot ∴ symbol meaning - Mathematics Stack Exchange. Whats the meaning of this symbol?